Checklist of the vascular plants of ARIZONA
(excluding grasses and their allies)


ACANTHACEAE
Adhatoda candicans Nees
  = Justicia candicans
Adhatoda longiflora Torr.
  = Siphonoglossa longiflora
Anisacanthus thurberi (Torr.) Gray
  chuparosa
Beloperone californica Benth.
  = Justicia californica
Carlowrightia arizonica Gray
  Arizona wrightwort
Carlowrightia linearifolia (Torr.) Gray
  heath wrightwort
Dicliptera resupinata (Vahl) Juss.
  Arizona foldwing
Dyschoriste decumbens (Gray) Kuntze
  spreading snakeherb
Elytraria imbricata (Vahl) Pers.
  purple scalystem
Henrya insularis Nees ex Benth.
  island renegade
Jacobinia ovata Gray
  = Justicia candicans
Justicia californica (Benth.) D. Gibson
  beloperone, chuparosa
Justicia candicans (Nees) L. Benson
  jacobinia
Justicia sonorae Wasshausen
  Sonoran waterwillow
Ruellia nudiflora (Engelm. & Gray) Urban
  violet wild petunia
Siphonoglossa longiflora (Torr.) Gray
  Siphonoglossa
Tetramerium nervosum Nees
  hairy fournwort

ACERACEAE
Acer glabrum Torr.
  Rocky Mountain maple
Acer grandidentatum Nutt.
  bigtooth maple
Acer negundo var. arizonicum Sarg.
  Arizona boxelder
Acer negundo var. californicum (Torr. & Gray) Sarg.
  California boxelder
Acer negundo var. interius (Britt.) Sarg.
  boxelder maple

AGAVACEAE
Agave americana L.
  American century plant
Agave arizonica Gentry & J.H. Weber
  Arizona century plant
Agave chrysantha Peebles
  goldenflower century plant
Agave deserti Engelm.
  desert agave
Agave mckelveyana Gentry
  McKelvey's century plant
Agave murpheyi F. Gibson
  Murphey's century plant
Agave palmeri Engelm.
  Palmer's century plant
Agave parryi Engelm.
  Parry's agave
Agave parviflora Torr.
  smallflower century plant
Agave schottii Engelm.
  Schott's century plant
Agave schottii var. treleasei (Toumey) Kearney & Peebles
  Trelease's century plant
Agave toumeyana Trel.
  Toumey's century plant
Agave utahensis Engelm.
  Utah agave
Agave utahensis var. kaibabensis (McKelvey) Breitung
  Kaibab agave
Dasylirion wheeleri S. Wats.
  common sotol, desert spoon
Nolina bigelovii (Torr.) S. Wats.
  Bigelow's nolina
Nolina microcarpa S. Wats.
  sacahuista, beargrass
Nolina parryi S. Wats.
  Parryıs nolina
Nolina texana S. Wats.
  Texas sacahuista
Yucca angustissima Engelm. ex Trel.
  narrowleaf yucca
Yucca angustissima var. angustissima Engelm. ex Trel.
  fineleaf yucca
Yucca angustissima var. kanabensis (McKelvey) Reveal
  Kanab yucca
Yucca arizonica McKelvey
  = Yucca baccata var. brevifolia
Yucca baccata Torr.
  banana yucca
Yucca baccata var. brevifolia (Schott ex Torr.) L. Benson & Darrow
  Spanish dagger
Yucca baileyi Woot. & Standl.
  Navajo yucca
Yucca baileyi var. baileyi Woot. & Standl.
  Bailey's yucca
Yucca baileyi var. navajoa (J.M. Webber) J.M. Webber
  Navajo yucca
Yucca brevifolia Engelm.
  Joshua tree
Yucca brevifolia var. brevifolia Engelm.
  Joshua tree
Yucca brevifolia var. jaegeriana McKelvey
  Jaeger's Joshua tree
Yucca elata (Engelm.) Engelm.
  soaptree yucca
Yucca elata var. elata (Engelm.) Engelm.
  soaptree yucca
Yucca elata var. utahensis (McKelvey) Reveal
  Utah yucca
Yucca elata var. verdiensis (McKelvey) Reveal
  Verdi yucca
Yucca harrimaniae Trel.
  Spanish bayonet
Yucca harrimaniae var. harrimaniae Trel.
  Harriman's Spanish bayonet
Yucca schidigera Roezl ex Ortgies
  Mojave yucca
Yucca schottii Engelm.
  Schott's yucca
Yucca whipplei Torr.
  chaparral yucca, our lordıs candle
Yucca whipplei var. whipplei Torr.
  chaparral yucca

AIZOACEAE
Cypselea humifusa Turp.
  panal
Mesembryanthemum crystallinum L.
  common iceplant
Mesembryanthemum nodiflorum L.
  slenderleaf iceplant
Sesuvium verrucosum Raf.
  seapurslane
Trianthema portulacastrum L.
  horsepurslane, verdolaga blanca

ALISMATACEAE
Alisma gramineum Lej.
  narrowleaf water plantain
Alisma plantago-aquatica ssp. brevipes (Greene) Samuelsson
  = Alisma triviale
Alisma plantago-aquatica ssp. subcordatum (Raf.) Hulten
  = Alisma subcordatum
Alisma subcordatum Raf.
  American water plantain
Alisma triviale Pursh
  northern water plantain
Echinodorus berteroi (Spreng.) Fassett
  upright burrhead
Sagittaria calycina Engelm.
  hooded arrowhead
Sagittaria cuneata Sheldon
  arumleaf arrowhead
Sagittaria graminea Michx.
  grassy arrowhead
Sagittaria greggii J.G. Sm.
  Gregg's arrowhead
Sagittaria latifolia Willd.
  broadleaf arrowhead
Sagittaria latifolia var. latifolia Willd.
  broadleaf arrowhead
Sagittaria longiloba Engelm. ex J.G. Sm.
  longbarb arrowhead
Sagittaria montevidensis Cham. & Schlecht.
  giant arrowhead

AMARANTHACEAE
Alternanthera pungens Kunth
  khakiweed
Alternanthera repens (L.) Link, non J.F. Gmel.
  = Alternanthera pungens
Amaranthus acanthochiton Sauer
  greenstripe
Amaranthus albus L.
  pigweed
Amaranthus blitoides S. Wats.
  mat amaranth
Amaranthus crassipes Schlecht.
  spreading amaranth
Amaranthus cruentus L.
  red amaranth
Amaranthus fimbriatus (Torr.) Benth. ex S. Wats.
  fringed amaranth
Amaranthus hybridus L.
  slim amaranth, quelite
Amaranthus hypochondriacus L.
  red cockscomb, alegria
Amaranthus obcordatus (Gray) Standl.
  Trans-Pecos amaranth
Amaranthus palmeri S. Wats.
  carelessweed
Amaranthus powellii S. Wats.
  Powell's amaranth, quelite
Amaranthus retroflexus L.
  alegria
Amaranthus viridis L.
  slender amaranth
Amaranthus watsonii Standl.
  Watson's amaranth
Amaranthus wrightii S. Wats.
  Wright's amaranth
Brayulinea densa (Humb. & Bonpl. ex Willd.) Small
  = Guilleminea densa var. densa
Froelichia arizonica Thornb. ex Standl.
  Arizona snakecotton
Froelichia gracilis (Hook.) Moq.
  slender snakecotton
Froelichia interrupta (L.) Moq.
  Texas snakecotton
Gomphrena caespitosa Torr.
  tufted globe amaranth
Gomphrena nitida Rothrock
  pearly globe amaranth
Gomphrena sonorae Torr.
  Sonoran globe amaranth
Gomphrena viridis Woot. & Standl.
  = Gomphrena caespitosa
Guilleminea densa (Humb. & Bonpl. ex Willd.) Moq.
  small matweed
Iresine heterophylla Standl.
  Standley's bloodleaf
Tidestromia lanuginosa (Nutt.) Standl.
  espanta vaqueras
Tidestromia oblongifolia (S. Wats.) Standl.
  Arizona honeysweet

ANACARDIACEAE
Rhus aromatica var. trilobata (Nutt.) Gray
  = Rhus trilobata var. trilobata
Rhus choriophylla Woot. & Standl.
  = Rhus virens var. choriophylla
Rhus copallinum var. lanceolata Gray
  = Rhus lanceolata
Rhus glabra L.
  smooth sumac
Rhus kearneyi Barkl.
  Kearney's sumac
Rhus lanceolata (Gray) Britt.
  prairie sumac
Rhus microphylla Engelm. ex Gray
  littleleaf sumac
Rhus ovata S. Wats.
  sugar sumac
Rhus radicans var. rydbergii (Small ex Rydb.) Rehd.
  = Toxicodendron rydbergii
Rhus toxicodendron var. vulgaris Michx.
  = Toxicodendron rydbergii
Rhus trilobata Nutt.
  skunkbush sumac
Rhus trilobata var. anisophylla (Greene) Jepson
  skunkbush sumac
Rhus trilobata var. pilosissima Engelm.
  pubescent squawbush
Rhus trilobata var. quinata (Greene) Jepson
  skunkbush sumac
Rhus trilobata var. racemulosa (Greene) Barkl.
  skunkbush sumac
Rhus trilobata var. simplicifolia (Greene) Barkl.
  skunkbush sumac
Rhus virens Lindheimer ex Gray
  evergreen sumac
Rhus virens var. choriophylla (Woot. & Standl.) L. Benson
  evergreen sumac
Toxicodendron radicans (L.) Kuntze
  eastern poison ivy
Toxicodendron rydbergii (Small ex Rydb.) Greene
  western poison ivy

APOCYNACEAE
Amsonia brevifolia Gray
  = Amsonia tomentosa var. tomentosa
Amsonia eastwoodiana Rydb.
  Eastwood's bluestar
Amsonia grandiflora Alexander
  Arizona bluestar
Amsonia hirtella Standl.
  = Amsonia palmeri
Amsonia jonesii Woods.
  Jones' bluestar
Amsonia kearneyana Woods.
  Kearney's bluestar
Amsonia palmeri Gray
  Palmer's bluestar
Amsonia peeblesii Woods.
  Peebles' bluestar
Amsonia tomentosa Torr. & Frem.
  woolly bluestar
Apocynum X floribundum Greene (pro sp.)
  intermediate dogbane
Apocynum androsaemifolium L.
  spreading dogbane
Apocynum cannabinum L.
  Indianhemp
Apocynum medium Greene
  = Apocynum X floribundum
Apocynum sibiricum Jacq.
  = Apocynum cannabinum
Apocynum suksdorfii Greene
  = Apocynum cannabinum
Cycladenia humilis Benth.
  Sacramento waxydogbane
Cycladenia humilis var. jonesii (Eastw.) Welsh & Atwood
  Jones' waxydogbane
Haplophyton cimicidum A. DC.
  cockroachplant
Macrosiphonia brachysiphon (Torr.) Gray
  rock trumpet
Vinca major L.
  greater periwinkle
Vinca minor L.
  lesser periwinkle

ARACEAE
Pistia stratiotes L.
  water lettuce

ARALIACEAE
Aralia bicrenata Woot. & Standl.
  = Aralia racemosa ssp. bicrenata
Aralia humilis Cav.
  Arizona spikenard
Aralia racemosa L.
  American spikenard
Aralia racemosa ssp. bicrenata (Woot. & Standl.) Welsh & Atwood
  western spikenard
Hedera colchica (K. Koch) K. Koch
  colchis ivy
Hedera helix L.
  English ivy

ARECACEAE
Washingtonia filifera (L. Linden) H. Wendl.
  California fan palm

ARISTOLOCHIACEAE
Aristolochia porphyrophylla H. Pfeifer
  = Aristolochia watsonii
Aristolochia watsonii Woot. & Standl.
  indian root, raiz del indio

ASCLEPIADACEAE
Asclepias albicans S. Wats.
  whitestem milkweed
Asclepias angustifolia Schweig.
  Arizona milkweed
Asclepias asperula (Dcne.) Woods.
  spider milkweed, inmortal
Asclepias asperula ssp. asperula (Dcne.) Woods.
  spider milkweed, inmortal
Asclepias asperula ssp. capricornu (Woods.) Woods.
  antelopehorns, inmortal
Asclepias brachystephana Engelm. ex Torr.
  bract milkweed, little inmortal
Asclepias capricornu Woods.
  = Asclepias asperula ssp. capricornu
Asclepias cryptoceras S. Wats.
  pallid milkweed
Asclepias cutleri Woods.
  Cutler's milkweed
Asclepias decumbens (Nutt.) Dcne.
  = Asclepias asperula ssp. capricornu
Asclepias elata Benth.
  = Asclepias glaucescens
Asclepias engelmanniana Woods.
  Engelmann's milkweed
Asclepias erosa Torr.
  desert milkweed
Asclepias glaucescens Kunth
  nodding milkweed
Asclepias hallii Gray
  Hall's milkweed
Asclepias hypoleuca (Gray) Woods.
  mahogany milkweed
Asclepias involucrata Engelm. ex Torr.
  dwarf milkweed
Asclepias latifolia (Torr.) Raf.
  broadleaf milkweed
Asclepias lemmonii Gray
  Lemmon's milkweed
Asclepias linaria Cav.
  pineneedle milkweed
Asclepias macrosperma Eastw.
  largeseed milkweed
Asclepias macrotis Torr.
  longhood milkweed
Asclepias nummularia Torr.
  tufted milkweed
Asclepias nyctaginifolia Gray
  Mojave milkweed
Asclepias quinquedentata Gray
  slimpod milkweed
Asclepias rusbyi (Vail) Woods.
  Rusby's milkweed
Asclepias speciosa Torr.
  showy milkweed
Asclepias subulata Dcne.
  rush milkweed, desert milkweed
Asclepias subverticillata (Gray) Vail
  whorled milkweed
Asclepias tuberosa L.
  butterfly milkweed, pleurisy root
Asclepias tuberosa ssp. interior Woods.
  butterfly milkweed, pleurisy root
Asclepias uncialis Greene
  wheel milkweed
Asclepias viridiflora Raf.
  green milkweed
Asclepias welshii N.& P. Holmgren
  Welsh's milkweed
Asclepiodora decumbens (Nutt.) Gray
  = Asclepias asperula ssp. capricornu
Cynanchum arizonicum (Gray) Shinners
  Arizona swallowwort
Cynanchum ligulatum (Benth.) Woods.
  Mexican swallowwort
Cynanchum sinaloense (Brandeg.) Woods.
  = Cynanchum ligulatum
Cynanchum utahense (Engelm.) Woods.
  Utah swallowwort
Cynanchum wigginsii Shinners
  Wiggins' swallowwort
Funastrum
  = Sarcostemma
Gonolobus
  = Matelea 
Matelea arizonica (Gray) Shinners
  Arizona milkvine
Matelea balbisii (Dcne.) Woods.
  Balbis' milkvine
Matelea cordifolia (Gray) Woods.
  Sonoran milkvine
Matelea parvifolia (Torr.) Woods.
  spearleaf
Matelea producta (Torr.) Woods.
  Texas milkvine
Sarcostemma crispum Benth.
  wavyleaf climbing milkweed
Sarcostemma cynanchoides Dcne.
  fringed climbing milkweed
Sarcostemma cynanchoides ssp. cynanchoides Dcne.
  fringed climbing milkweed
Sarcostemma cynanchoides ssp. hartwegii (Vail) R. Holm
  Hartweg's climbing milkweed
Sarcostemma hirtellum (Gray) R. Holm
  hairy milkweed

ASPLENIACEAE (Polypodiaceae)
Asplenium adiantum-nigrum L.
  black spleenwort
Asplenium dalhousiae Hook.
  Countess Dalhousie's spleenwort
Asplenium exiguum Bedd.
  little spleenwort
Asplenium monanthes L.
  singlesorus spleenwort
Asplenium palmeri Maxon
  Palmer's spleenwort
Asplenium platyneuron (L.) B.S.P.
  ebony spleenwort
Asplenium resiliens Kunze
  blackstem spleenwort
Asplenium septentrionale (L.) Hoffmann
  forked spleenwort
Asplenium trichomanes L.
  maidenhair spleenwort

AZOLLACEAE (Salviniaceae)
Azolla filiculoides Lam.
  Pacific azolla

BERBERIDACEAE
Berberis aquifolium var. repens (Lindl.) Scoggan
  = Mahonia repens
Berberis fremontii Torr.
  = Mahonia fremontii
Berberis haematocarpa Woot.
  = Mahonia haematocarpa
Berberis harrisoniana Kearney & Peebles
  Harrison's barberry
Berberis repens Lindl.
  = Mahonia repens
Berberis wilcoxii Kearney
  Wilcox's Oregongrape
Mahonia fremontii (Torr.) Fedde
  Fremont's mahonia
Mahonia haematocarpa (Woot.) Fedde
  red barberry
Mahonia repens (Lindl.) G. Don
  creeping Oregongrape
Mahonia trifoliolata (Moric.) Fedde
  algerita
Mahonia wilcoxii 
  = Berberis wilcoxii

BETULACEAE
Alnus incana (L.) Moench
  mountain alder
Alnus incana ssp. tenuifolia (Nutt.) Breitung
  thinleaf alder
Alnus oblongifolia Torr.
  Arizona alder
Alnus tenuifolia Nutt.
  = Alnus incana ssp. tenuifolia
Betula occidentalis Hook.
  water birch
Betula papyrifera var. occidentalis (Hook.) Sarg.
  = Betula occidentalis
Ostrya knowltonii Coville
  Knowlton's hophornbeam

BIGNONIACEAE
Catalpa bignonioides Walt.
  southern catalpa
Chilopsis linearis (Cav.) Sweet
  desert willow
Chilopsis linearis ssp. arcuata (Fosberg) Henrickson
  desert willow
Tecoma stans (L.) Juss. ex Kunth
  yellow trumpetbush, tronadora

BIXACEAE (Cochlospermaceae)
Amoreuxia gonzalezii Sprague & Riley
  Santa Rita mountain yellowshow, sayas
Amoreuxia palmatifida Moc. & Sesse ex DC.
  Mexican yellowshow, sayas

BLECHNACEAE (Polypodiaceae)
Woodwardia fimbriata Sm.
  giant chainfern

BORAGINACEAE
Amsinckia intermedia Fisch. & C.A. Mey.
  = Amsinckia menziesii var. intermedia
Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr.
  Menzies' fiddleneck
Amsinckia menziesii var. intermedia (Fisch & C.A. Mey.) Ganders
Amsinckia tessellata Gray
  bristly fiddleneck
Coldenia 
  = Tiquilia 
Cordia parvifolia A. DC.
  smallleaf geigertree
Cryptantha abata I.M. Johnston
  dentnut catseye
Cryptantha albida (Kunth) I.M. Johnston
  New Mexico catseye
Cryptantha angustifolia (Torr.) Greene
  Panamint catseye
Cryptantha atwoodii Higgins
  Atwood's catseye
Cryptantha bakeri (Greene) Payson
  Baker's catseye
Cryptantha barbigera (Gray) Greene
  bearded catseye
Cryptantha capitata (Eastw.) I.M. Johnston
  capitate catseye
Cryptantha cinerea (Greene) Cronq.
  James' catseye
Cryptantha circumscissa (Hook. & Arn.) I.M. Johnston
  cushion catseye
Cryptantha confertiflora (Greene) Payson
  basin yellow catseye
Cryptantha costata Brandeg.
  ribbed catseye
Cryptantha crassisepala (Torr. & Gray) Greene
  thicksepal catseye
Cryptantha dumetorum (Greene ex Gray) Greene
  bushloving catseye
Cryptantha fendleri (Gray) Greene
  sanddune catseye
Cryptantha flava (A. Nels.) Payson
  Brenda's yellow catseye
Cryptantha flavoculata (A. Nels.) Payson
  roughseed catseye
Cryptantha fulvocanescens (S. Wats.) Payson
  tawny catseye
Cryptantha gracilis Osterhout
  narrowstem catseye
Cryptantha holoptera (Gray) J.F. Macbr.
  winged catseye
Cryptantha humilis (Gray) Payson
  roundspike catseye
Cryptantha inaequata I.M. Johnston
  = Cryptantha holoptera
Cryptantha intermedia (Gray) Greene
  Clearwater catseye
Cryptantha jamesii (Torr.) Payson
  = Cryptantha cinerea 
Cryptantha maritima (Greene) Greene
  Guadalupe catseye
Cryptantha micrantha (Torr.) I.M. Johnston
  redroot catseye
Cryptantha muricata (Hook. & Arn.) A. Nels. & J.F. Macbr.
  pointed catseye
Cryptantha nevadensis A. Nels. & Kennedy
  Nevada catseye
Cryptantha osterhoutii (Payson) Payson
  Osterhout's catseye
Cryptantha pterocarya (Torr.) Greene
  wingnut catseye
Cryptantha pusilla (Torr. & Gray) Greene
  low catseye
Cryptantha racemosa (S. Wats.) Greene
  bushy catseye
Cryptantha recurvata Coville
  curvenut catseye
Cryptantha semiglabra Barneby
  smooth catseye
Cryptantha setosissima (Gray) Payson
  bristly catseye
Cryptantha tenuis (Eastw.) Payson
  canyon catseye
Cryptantha utahensis (Gray) Greene
  scented catseye
Cryptantha virginensis (M.E. Jones) Payson
  Virgin River catseye
Cynoglossum officinale L.
  hounds tongue
Hackelia besseyi (Rydb.) J.L. Gentry
  Bessey's stickseed
Hackelia floribunda (Lehm.) I.M. Johnston
  manyflower stickseed
Hackelia pinetorum (Greene ex Gray) I.M. Johnston
  Livermore stickseed
Hackelia ursina (Greene ex Gray) I.M. Johnston
  Chihuahuan stickseed
Harpagonella palmeri Gray
  Palmer's grapplinghook
Heliotropium convolvulaceum (Nutt.) Gray
  phlox heliotrope
Heliotropium curassavicum L.
  salt heliotrope
Heliotropium fruticosum L.
  Key West heliotrope
Heliotropium phyllostachyum Torr.
  = Heliotropium fruticosum
Heliotropium pringlei B.L. Robins.
  Pringle's heliotrope
Heliotropium procumbens P. Mill.
  fourspike heliotrope
Lappula echinata Gilib.
  = Lappula squarrosa
Lappula occidentalis (S. Wats.) Greene
  flatspine stickseed
Lappula redowskii auct. non (Hornem.) Greene
  = Lappula occidentalis var. occidentalis
Lappula squarrosa (Retz.) Dumort.
  European stickseed
Lappula texana (Scheele) Britt.
  = Lappula occidentalis var. cupulata
Lithospermum cobrense Greene
  smooththroat gromwell
Lithospermum confine I.M. Johnston
  Arizona gromwell
Lithospermum incisum Lehm.
  narrowleaf gromwell
Lithospermum multiflorum Torr. ex Gray
  manyflowered gromwell
Lithospermum viride Greene
  green gromwell
Macromeria viridiflora DC.
  gianttrumpets
Mertensia arizonica Greene
  aspen bluebells
Mertensia ciliata (James ex Torr.) G. Don
  mountain bluebells
Mertensia franciscana Heller
  Franciscan bluebells
Mertensia macdougalii Heller
  Macdougal's bluebells
Mertensia paniculata (Ait.) G. Don
  tall bluebells
Myosotis scorpioides L.
  true forget me not
Myosotis verna Nutt.
  spring forget me not
Pectocarya heterocarpa (I.M. Johnston) I.M. Johnston
  chuckwalla combseed
Pectocarya penicillata (Hook. & Arn.) A. DC.
  sleeping combseed
Pectocarya platycarpa (Munz & Johnston) Munz & Johnston
  broadfruit combseed
Pectocarya recurvata I.M. Johnston
  curvenut combseed
Pectocarya setosa Gray
  moth combseed
Plagiobothrys arizonicus (Gray) Greene ex Gray
  Arizona popcornflower
Plagiobothrys californicus var. fulvescens I.M. Johnston
  = Plagiobothrys collinus var. fulvescens
Plagiobothrys cognatus (Greene) I.M. Johnston
  = Plagiobothrys scouleri var. hispidulus
Plagiobothrys collinus (Phil.) I.M. Johnston
  Cooper's popcornflower
Plagiobothrys glaber (Gray) I.M. Johnston
  hairless popcornflower
Plagiobothrys jonesii Gray
  Mojave popcornflower
Plagiobothrys pringlei Greene
  Pringle's popcornflower
Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnston
  Scouler's popcornflower
Plagiobothrys tenellus (Nutt. ex Hook.) Gray
  Pacific popcornflower
Tiquilia canescens (DC.) A. Richards.
  woody crinklemat
Tiquilia canescens var. pulchella (I.M. Johnston) A. Richards.
  woody crinklemat
Tiquilia latior (I.M. Johnston) A. Richards.
  matted crinklemat
Tiquilia nuttallii (Hook.) A. Richards.
  Nuttall's coldenia
Tiquilia palmeri (Gray) A. Richards.
  Palmer's coldenia
Tiquilia plicata (Torr.) A. Richards.
  fanleaf crinklemat

BROMELIACEAE
Tillandsia recurvata (L.) L.
  small ballmoss

BUDDLEJACEAE (Loganiaceae)
Buddleja scordioides Kunth
  escobilla butterflybush
Buddleja sessiliflora Kunth
  Rio Grande butterflybush
Buddleja utahensis Coville
  Utah butterflybush

BURSERACEAE
Bursera fagaroides (Kunth) Engl.
  fragrant bursera
Bursera microphylla Gray
  elephanttree, torote

CACTACEAE
Carnegia gigantea (Engelm.) Britt. & Rose
  saguaro
Cereus diguetii A. Weber
  = Peniocereus striatus
Cereus giganteus Engelm.
  = Carnegia gigantea
Cereus greggii Engelm.
  = Peniocereus greggii var. greggii
Cereus schottii Engelm.
  = Pachycereus schottii
Cereus striatus Brandeg.
  = Peniocereus striatus
Cereus thurberi Engelm.
  = Stenocereus thurberi
Cochiseia robbinsiorum W.H. Earle
  = Escobaria robbinsiorum
Coryphantha missouriensis (Sweet) Britt. & Rose
  = Escobaria missouriensis var. missouriensis
Coryphantha recurvata (Engelm.) Britt. & Rose
  Santa Cruz beehive cactus
Coryphantha scheeri (Muehlenpfordt) L. Benson
  Scheer's beehive cactus
Coryphantha strobiliformis auct. non (Poselg.) Orcutt
  = Escobaria tuberculosa
Coryphantha vivipara (Nutt.) Britt. & Rose
  = Escobaria vivipara var. vivipara
Coryphantha vivipara var. alversonii (Coult.) L. Benson
  = Escobaria alversonii
Coryphantha vivipara var. arizonica (Engelm.) W.T. Marsh.
  = Escobaria vivipara var. arizonica
Coryphantha vivipara var. bisbeeana (Orcutt) L. Benson
  = Escobaria vivipara var. bisbeeana
Coryphantha vivipara var. buoflama P.C. Fischer
  = Escobaria vivipara var. buoflama
Coryphantha vivipara var. deserti (Engelm.) W.T. Marsh.
  = Escobaria vivipara var. deserti
Coryphantha vivipara var. rosea (Clokey) L. Benson
  = Escobaria vivipara var. rosea
Cylindropuntia imbricata (Haw.) F.M. Knuth
  = Opuntia imbricata var. imbricata
Cylindropuntia whipplei (Engelm. & Bigelow) F.M. Knuth
  = Opuntia whipplei var. whipplei
Echinocactus horizonthalonius Lem.
  devilshead
Echinocactus polycephalus Engelm. & Bigelow
  cottontop cactus
Echinocereus coccineus Engelm.
  scarlet hedgehog cactus
Echinocereus engelmannii (Parry ex Engelm.) Lem.
  saints cactus
Echinocereus fasciculatus (Engelm. ex B.D. Jackson) L. Benson
  = Echinocereus fendleri 
Echinocereus fendleri (Engelm.) F. Seitz
  pinkflower hedgehog cactus
Echinocereus ledingii Peebles
  = Echinocereus fendleri var. ledingii
Echinocereus nicholii (L. Benson) Parfitt
  Nichol's hedgehog cactus
Echinocereus pectinatus (Scheidw.) Engelm.
  rainbow cactus
Echinocereus polyacanthus Engelm.
  Mojave mound cactus
Echinocereus rigidissimus (Engelm.) Haage f.
  rainbow hedgehog cactus
Echinocereus triglochidiatus Engelm.
  kingcup cactus
Epithelantha micromeris (Engelm.) A. Weber ex Britt. & Rose
  pingpong ball cactus
Escobaria alversonii (Coult.) N.P. Taylor, comb. nov. ined.
  cushion foxtail cactus
Escobaria missouriensis (Sweet) D.R. Hunt
  Missouri foxtail cactus
Escobaria missouriensis var. marstonii (Clover) D.R. Hunt
  Marston's foxtail cactus
Escobaria orcuttii Bodecker
  Orcutt's foxtail cactus
Escobaria robbinsiorum (W.H. Earle) D.R. Hunt
  Cochise foxtail cactus
Escobaria tuberculosa (Engelm.) Britt. & Rose
  whitecolumn foxtail cactus
Escobaria vivipara (Nutt.) Buxbaum
  spinystar
Ferocactus acanthodes (Lem.) Britt. & Rose
  = Ferocactus cylindraceus var. cylindraceus
Ferocactus covillei Britt. & Rose
  = Ferocactus emoryi
Ferocactus cylindraceus (Engelm.) Orcutt
  California barrelcactus
Ferocactus emoryi (Engelm.) Orcutt
  Emory's barrelcactus
Ferocactus wislizeni (Engelm.) Britt. & Rose
  candy barrelcactus
Lemaireocereus thurberi (Engelm.) Britt. & Rose
  = Stenocereus thurberi
Lophocereus schottii (Engelm.) Britt. & Rose
  = Pachycereus schottii
Mammillaria grahamii Engelm.
  Graham's nipple cactus
Mammillaria gummifera Engelm. p.p.
  = Mammillaria heyderi var. macdougalii
Mammillaria heyderi Muehlenpfordt
  little nipple cactus
Mammillaria lasiacantha Engelm.
  lacespine nipple cactus
Mammillaria mainiae K. Brandeg.
  counterclockwise nipple cactus
Mammillaria microcarpa Engelm.
  = Mammillaria grahamii var. grahamii
Mammillaria orestera L. Benson
  = Mammillaria viridiflora
Mammillaria tetrancistra Engelm.
  common fishhook cactus
Mammillaria thornberi Orcutt
  Thornber's nipple cactus
Mammillaria viridiflora (Britt. & Rose) Bodecker
  greenflower nipple cactus
Mammillaria wrightii Engelm.
  Wright's nipple cactus
Neolloydia erectocentra (Coult.) L. Benson
  = Sclerocactus erectocentrus
Neolloydia intertexta (Engelm.) L. Benson
  = Sclerocactus intertextus var. intertextus
Neolloydia johnsonii (Parry ex Engelm.) L. Benson
  = Sclerocactus johnsonii
Opuntia X kelvinensis V.& K. Grant (pro sp.)
  Kelvin's pricklypear
Opuntia acanthocarpa Engelm. & Bigelow
  buckhorn cholla
Opuntia arbuscula Engelm.
  Arizona pencil cholla
Opuntia basilaris Engelm. & Bigelow
  beavertail pricklypear
Opuntia basilaris var. aurea (E.M. Baxter) W.T. Marsh.
  golden pricklypear
Opuntia basilaris var. basilaris Engelm. & Bigelow
  beavertail pricklypear
Opuntia basilaris var. longiareolata (Clover & Jotter) L. Benson
  beavertail pricklypear
Opuntia basilaris var. treleasei (Coult.) Coult. ex Toumey
  Trelease's beavertail pricklypear
Opuntia bigelovii Engelm.
  teddybear cholla
Opuntia canada Griffiths
  = Opuntia phaeacantha var. major
Opuntia chlorotica Engelm. & Bigelow
  dollarjoint pricklypear
Opuntia clavata Engelm.
  club cholla
Opuntia curvospina Griffiths
  Searchlight pricklypear
Opuntia echinocarpa Engelm. & Bigelow
  staghorn cholla
Opuntia engelmannii Salm-Dyck
  cactus apple
Opuntia erinacea Engelm. & Bigelow ex Engelm.
  grizzlybear pricklypear
Opuntia erinacea var. utahensis (Engelm.) L. Benson
  Utah grizzlybear pricklypear
Opuntia ficus-indica (L.) P. Mill.
  tuna cactus
Opuntia fragilis (Nutt.) Haw.
  brittle pricklypear
Opuntia fulgida Engelm.
  jumping cholla
Opuntia gosseliniana A. Weber
  violet pricklypear
Opuntia imbricata (Haw.) DC.
  tree cholla
Opuntia kleiniae var. tetracantha (Toumey) W.T. Marsh.
  = Opuntia tetracantha
Opuntia kunzei Rose
  devil's cholla
Opuntia leptocaulis DC.
  Christmas cactus
Opuntia littoralis (Engelm.) Cockerell
  coastal pricklypear
Opuntia macrocentra Engelm.
  purple pricklypear
Opuntia macrorhiza Engelm.
  twistspine pricklypear
Opuntia martiniana (L. Benson) Parfitt
  seashore cactus
Opuntia microcarpa Engelm. ex B.D. Jackson
  smallfruit cactus
Opuntia nicholii L. Benson
  Navajo Bridge pricklypear
Opuntia parishii Orcutt
  matted cholla
Opuntia phaeacantha Engelm.
  tulip pricklypear
Opuntia phaeacantha var. major Engelm.
  Mojave pricklypear
Opuntia polyacantha Haw.
  plains pricklypear
Opuntia pulchella Engelm.
  sagebrush cholla
Opuntia ramosissima Engelm.
  branched pencil cholla
Opuntia santa-rita (Griffiths & Hare) Rose
  Santa Rita pricklypear
Opuntia spinosior (Engelm.) Toumey
  walkingstick cactus
Opuntia stanlyi Engelm.
  = Opuntia kunzei
Opuntia superbospina Griffiths
  Kingman pricklypear
Opuntia tetracantha Toumey
  Tucson pricklypear
Opuntia versicolor Engelm. ex Coult.
  staghorn cholla
Opuntia violacea Engelm.
  = Opuntia macrocentra 
Opuntia whipplei Engelm. & Bigelow
  Whipple cholla
Opuntia whipplei var. multigeniculata (Clokey) L. Benson
  rattail cholla
Opuntia wigginsii L. Benson
  Wiggins' cholla
Pachycereus schottii (Engelm.) D.R. Hunt
  senita cactus
Pachycereus thurberi (Engelm.) H. Bravo
  = Stenocereus thurberi
Pediocactus bradyi L. Benson
  Brady's hedgehog cactus
Pediocactus papyracanthus (Engelm.) L. Benson
  = Sclerocactus papyracanthus
Pediocactus paradinei B.W. Benson
  park hedgehog cactus
Pediocactus peeblesianus (Croizat) L. Benson
  Navajo pincushion cactus
Pediocactus sileri (Engelm.) L. Benson
  Siler's pincushion cactus
Pediocactus simpsonii (Engelm.) Britt. & Rose
  Simpson hedgehog cactus
Peniocereus greggii (Engelm.) Britt. & Rose
  nightblooming cereus
Peniocereus greggii var. greggii (Engelm.) Britt. & Rose
  nightblooming cereus
Peniocereus greggii var. transmontanus (Engelm.) Backeberg
  nightblooming cereus
Peniocereus striatus (Brandeg.) Buxbaum
  gearstem cactus
Sclerocactus erectocentrus (Coult.) N.P. Taylor
  redspine fishhook cactus
Sclerocactus intertextus (Engelm.) N.P. Taylor
  white fishhook cactus
Sclerocactus johnsonii (Parry ex Engelm.) N.P. Taylor
  Johnson's fishhook cactus
Sclerocactus papyracanthus (Engelm.) N.P. Taylor
  paperspine fishhook cactus
Sclerocactus parviflorus Clover & Jotter
  smallflower fishhook cactus
Sclerocactus pubispinus (Engelm.) L. Benson
  Great Basin fishhook cactus
Sclerocactus spinosior (Engelm.) Woodruff & L. Benson
  desert valley fishhook cactus
Sclerocactus whipplei (Engelm. & Bigelow) Britt. & Rose
  Whipple's fishhook cactus
Stenocereus thurberi (Engelm.) Buxbaum
  organpipe cactus
Wilcoxia diguetii (A. Weber) Peebles
  = Peniocereus striatus
Wilcoxia striata (Brandeg.) Britt. & Rose
  = Peniocereus striatus

CALLITRICHACEAE
Callitriche hermaphroditica L.
  northern waterstarwort
Callitriche heterophylla Pursh
  larger waterstarwort
Callitriche palustris L.
  vernal waterstarwort

CAMPANULACEAE
Campanula parryi Gray
  Parry's bellflower
Campanula rotundifolia L.
  bluebell bellflower
Lobelia anatina F. Wimmer
  Apache lobelia
Lobelia cardinalis L.
  cardinalflower
Lobelia cardinalis ssp. graminea (Lam.) McVaugh
  cardinalflower
Lobelia cardinalis ssp. graminea var. graminea (Lam.) McVaugh
  cardinalflower
Lobelia fenestralis Cav.
  fringeleaf lobelia
Lobelia laxiflora Kunth
  Sierra Madre lobelia
Lobelia laxiflora var. angustifolia A. DC.
  Sierra Madre lobelia
Nemacladus glanduliferus Jepson
  glandular threadplant
Nemacladus gracilis Eastw.
  slender threadplant
Nemacladus longiflorus Gray
  longflower threadplant
Nemacladus rubescens Greene
  desert threadplant
Nemacladus sigmoideus G.T. Robbins
  sigmoid threadplant
Porterella carnosula (Hook. & Arn.) Torr.
  fleshy porterella
Triodanis biflora (Ruiz & Pavon) Greene
  = Triodanis perfoliata var. biflora
Triodanis holzingeri McVaugh
  Holzinger's Venus' lookingglass
Triodanis perfoliata (L.) Nieuwl.
  clasping Venus' lookingglass

CANNABACEAE (Moraceae)
Humulus americanus
  = Humulus lupulus var. neomexicanus
Humulus lupulus L.
  common hop
Humulus lupulus var. neomexicanus A. Nels. & Cockerell
  common hop

CAPPARACEAE (w/Cleomaceae and Koeberliniaceae)
Atamisquea emarginata Miers ex Hook. & Arn.
  vomitbush
Cleome isomeris Greene
  bladderpod spiderflower
Cleome lutea Hook.
  yellow spiderflower
Cleome lutea var. jonesii J.F. Macbr.
  Jones spiderflower
Cleome lutea var. lutea Hook.
  yellow spiderflower
Cleome multicaulis DC.
  slender spiderflower
Cleome serrulata Pursh
  Rocky Mountain beeplant
Cleomella longipes Torr.
  Chiricahua Mountain stinkweed
Cleomella obtusifolia Torr. & Frem.
  Mojave cleomella
Cleomella parviflora Gray
  slender cleomella
Cleomella plocasperma S. Wats.
  twisted cleomella
Isomeris arborea Nutt.
  = Cleome isomeris
Koeberlinia spinosa Zucc.
  crown of thorns
Polanisia dodecandra (L.) DC.
  roughseed clammyweed
Wislizenia refracta Engelm.
  jackass clover
Wislizenia refracta ssp. refracta Engelm.
  spectacle fruit

CAPRIFOLIACEAE
Linnaea borealis L.
  twinflower
Linnaea borealis ssp. longiflora (Torr.) Hulten
  longtube twinflower
Lonicera albiflora Torr. & Gray
  western white honeysuckle
Lonicera arizonica Rehd.
  Arizona honeysuckle
Lonicera ciliosa (Pursh) Poir. ex DC.
  orange honeysuckle
Lonicera interrupta Benth.
  chaparral honeysuckle
Lonicera involucrata Banks ex Spreng.
  twinberry honeysuckle
Lonicera japonica Thunb.
  Japanese honeysuckle
Lonicera utahensis S. Wats.
  Utah honeysuckle
Sambucus cerulea var. cerulea Raf.
  blue elderberry
Sambucus glauca Nutt.
  = Sambucus nigra ssp. cerulea
Sambucus mexicana K. Presl ex DC.
  = Sambucus nigra ssp. canadensis
Sambucus microbotrys Rydb.
  = Sambucus racemosa var. racemosa
Sambucus nigra L.
  European black elder
Sambucus nigra ssp. canadensis (L.) R. Bolli
Sambucus nigra ssp. cerulea (Raf.) R. Bolli
Sambucus racemosa L.
  scarlet elderberry
Sambucus racemosa ssp. pubens var. melanocarpa (Gray) McMinn
  black elderberry
Sambucus racemosa var. racemosa L.
Sambucus velutina Dur. & Hilg.
  = Sambucus nigra ssp. cerulea
Symphoricarpos longiflorus Gray
  desert snowberry
Symphoricarpos oreophilus Gray
  whortleleaf snowberry
Symphoricarpos palmeri G.N. Jones
  Palmer's snowberry
Symphoricarpos parishii Rydb.
  = Symphoricarpos rotundifolius var. parishii
Symphoricarpos rotundifolius Gray
  roundleaf snowberry
Symphoricarpos utahensis Rydb.
  = Symphoricarpos oreophilus var. utahensis

CARYOPHYLLACEAE
Achyronychia cooperi Torr. & Gray
  onyxflower
Arenaria aberrans M.E. Jones
  Mt. Dellenbaugh sandwort
Arenaria aculeata S. Wats.
  prickly sandwort
Arenaria confusa Rydb.
  = Arenaria lanuginosa ssp. saxosa
Arenaria congesta Nutt.
  ballhead sandwort
Arenaria douglasii Fenzl ex Torr. & Gray
  = Minuartia douglasii
Arenaria eastwoodiae Rydb.
  Eastwood's sandwort
Arenaria fendleri Gray
  Fendler's sandwort
Arenaria filiorum Maguire
  = Minuartia filiorum
Arenaria lanuginosa (Michx.) Rohrb.
  spreading sandwort
Arenaria macradenia S. Wats.
  Mojave sandwort
Arenaria obtusiloba (Rydb.) Fern.
  = Minuartia obtusiloba
Arenaria rubella (Wahlenb.) Sm.
  = Minuartia rubella
Cerastium arvense L.
  field chickweed
Cerastium beeringianum Cham. & Schlecht.
  Bering chickweed
Cerastium brachypodum (Engelm. ex Gray) B.L. Robins.
  shortstalk chickweed
Cerastium fontanum Baumg.
  common chickweed
Cerastium fontanum ssp. vulgare (Hartman) Greuter & Burdet
  big chickweed
Cerastium nutans Raf.
  nodding chickweed
Cerastium sordidum B.L. Robins.
  Chihuahuan chickweed
Cerastium texanum Britt.
  Texas chickweed
Cerastium vulgatum L. 1762, non 1755
  = Cerastium fontanum ssp. vulgare
Drymaria depressa Greene
  = Drymaria effusa var. depressa
Drymaria effusa Gray
  pinewoods drymary
Drymaria fendleri S. Wats.
  = Drymaria glandulosa
Drymaria glandulosa K. Presl
  Fendler's drymary
Drymaria leptophylla (Cham. & Schlecht.) Fenzl ex Rohrb.
  canyon drymary
Drymaria molluginea (Lag.) Didr.
  slimleaf drymary
Drymaria pachyphylla Woot. & Standl.
  thickleaf drymary
Drymaria tenella Gray
  = Drymaria leptophylla
Drymaria viscosa S. Wats.
  sticky drymary
Herniaria cinerea DC.
  = Herniaria hirsuta ssp. cinerea
Herniaria hirsuta L.
  hairy rupturewort
Loeflingia squarrosa Nutt.
  spreading pygmyleaf
Lychnis drummondii (Hook.) S. Wats.
  = Silene drummondii var. drummondii
Minuartia biflora (L.) Schinz & Thellung
  mountain stitchwort
Minuartia douglasii (Fenzl ex Torr. & Gray) Mattf.
  Douglas' stitchwort
Minuartia filiorum (Maguire) McNeill
  threadbranch stitchwort
Minuartia obtusiloba (Rydb.) House
  twinflower sandwort
Minuartia rubella (Wahlenb.) Hiern
  beautiful sandwort
Minuartia verna (L.) Hiern
  vernal stitchwort
Paronychia jamesii Torr. & Gray
  James' nailwort
Paronychia sessiliflora Nutt.
  creeping nailwort
Pseudostellaria jamesiana (Torr.) W.A. Weber & R.L. Hartman
  tuber starwort
Sagina decumbens (Ell.) Torr. & Gray
  beach pearlwort
Sagina occidentalis S. Wats.
  = Sagina decumbens ssp. occidentalis
Sagina saginoides (L.) Karst.
  arctic pearlwort
Saponaria officinalis L.
  bouncingbet
Saponaria vaccaria L.
  = Vaccaria hispanica
Silene acaulis (L.) Jacq.
  moss campion
Silene antirrhina L.
  sleepy silene
Silene drummondii Hook.
  Drummond's campion
Silene gallica L.
  common catchfly
Silene laciniata Cav.
  Mexican campion
Silene menziesii Hook.
  Menzies' campion
Silene rectiramea B.L. Robins.
  Grand Canyon campion
Silene scouleri Hook.
  Scouler's campion
Silene thurberi S. Wats.
  woolly catchfly
Spergularia salina J.& K. Presl
  salt sandspurry
Stellaria gonomischa Boivin
  = Stellaria umbellata
Stellaria jamesiana Torr.
  = Pseudostellaria jamesiana
Stellaria longifolia Muhl. ex Willd.
  longleaf starwort
Stellaria longipes Goldie
  longstalk starwort
Stellaria media (L.) Vill.
  common chickweed
Stellaria nitens Nutt.
  shiny chickweed
Stellaria umbellata Turcz. ex Kar. & Kir.
  umbrella starwort
Vaccaria hispanica (P. Mill.) Rauschert
  cow soapwort

CELASTRACEAE
Canotia holacantha Torr.
  crucifixion thorn
Mortonia scabrella Gray
  = Mortonia sempervirens ssp. scabrella
Mortonia sempervirens Gray
  Rio Grande saddlebush
Mortonia sempervirens ssp. scabrella (Gray) Prigge
  Rio Grande saddlebush
Mortonia utahensis (Coville ex Gray) A. Nels.
  Utah mortonia
Paxistima myrsinites (Pursh) Raf.
  boxleaf myrtle

CERATOPHYLLACEAE
Ceratophyllum demersum L.
  coon's tail

CHENOPODIACEAE
Allenrolfea occidentalis (S. Wats.) Kuntze
  iodinebush
Atriplex acanthocarpa (Torr.) S. Wats.
  tubercled saltbush
Atriplex argentea Nutt.
  silverscale saltbush
Atriplex canescens (Pursh) Nutt.
  fourwing saltbush
Atriplex confertifolia (Torr. & Frem.) S. Wats.
  shadscale saltbush
Atriplex cuneata A. Nels.
  valley saltbush
Atriplex elegans (Moq.) D. Dietr.
  wheelscale saltbush
Atriplex garrettii Rydb.
  Garrett's saltbush
Atriplex griffithsii Standl.
  Griffiths' saltbush
Atriplex hymenelytra (Torr.) S. Wats.
  desertholly
Atriplex lentiformis (Torr.) S. Wats.
  big saltbush
Atriplex linearis S. Wats.
  thinleaf fourwing saltbush
Atriplex obovata Moq.
  mound saltbush
Atriplex pacifica A. Nels.
  Davidson's saltbush
Atriplex patula var. hastata auct. non (L.) Gray
  = Atriplex prostrata
Atriplex phyllostegia (Torr. ex S. Wats.) S. Wats.
  leafcover saltweed
Atriplex polycarpa (Torr.) S. Wats.
  cattle saltbush
Atriplex powellii S. Wats.
  Powell's saltweed
Atriplex prostrata Boucher ex DC.
  triangle orache
Atriplex rosea L.
  tumbling saltweed
Atriplex saccaria S. Wats.
  sack saltbush
Atriplex semibaccata R. Br.
  Australian saltbush
Atriplex subspicata (Nutt.) Rydb.
  saline saltbush
Atriplex torreyi (S. Wats.) S. Wats.
  Torrey's saltbush
Atriplex wrightii S. Wats.
  Wright's saltbush
Bassia hyssopifolia (Pallas) Kuntz
  fivehorn smotherweed
Chenopodium album L.
  lambsquarters
Chenopodium ambrosioides L.
  Mexican tea
Chenopodium ambrosioides var. ambrosioides L.
  Mexican tea
Chenopodium ambrosioides var. anthelminticum (L.) Aellen
  = Chenopodium ambrosioides var. ambrosioides
Chenopodium atrovirens Rydb.
  pinyon goosefoot
Chenopodium berlandieri Moq.
  pitseed goosefoot
Chenopodium botrys L.
  Jerusalem oak goosefoot
Chenopodium capitatum (L.) Ambrosi
  blite goosefoot
Chenopodium desiccatum A. Nels.
  aridland goosefoot
Chenopodium fremontii S. Wats.
  Fremont's goosefoot
Chenopodium glaucum var. salinum (Standl.) Boivin
  = Chenopodium salinum
Chenopodium graveolens Willd.
  fetid goosefoot
Chenopodium hians Standl.
  hians goosefoot
Chenopodium incanum (S. Wats.) Heller
  mealy goosefoot
Chenopodium incognitum H.A. Wahl p.p.
  = Chenopodium atrovirens
Chenopodium leptophyllum (Moq.) Nutt. ex S. Wats.
  narrowleaf goosefoot
Chenopodium murale L.
  nettleleaf goosefoot
Chenopodium neomexicanum Standl.
  New Mexico goosefoot
Chenopodium pratericola Rydb.
  desert goosefoot
Chenopodium pumilio R. Br.
  clammy goosefoot
Chenopodium salinum Standl.
  Rocky Mountain goosefoot
Chenopodium watsonii A. Nels.
  Watson's goosefoot
Corispermum hyssopifolium L.
  common bugseed
Corispermum nitidum auct. non Kit. ex J.A. Schultes
  = Corispermum hyssopifolium
Corispermum orientale Lam.
  oriental bugseed
Cycloloma atriplicifolium (Spreng.) Coult.
  winged pigweed
Eurotia lanata (Pursh) Moq.
  = Krascheninnikovia lanata
Grayia brandegei Gray
  = Zuckia brandegei var. brandegei
Grayia spinosa (Hook.) Moq.
  spiny hopsage
Halogeton glomeratus (Bieb.) C.A. Mey.
  halogeton
Kochia americana S. Wats.
  greenmolly
Kochia prostrata (L.) Schrad.
  prostrate summercypress
Kochia scoparia (L.) Schrad.
  common kochia
Krascheninnikovia lanata (Pursh) Guldenstaedt
  winterfat
Monolepis nuttalliana (J.A. Schultes) Greene
  Nuttall's povertyweed
Nitrophila occidentalis (Moq.) S. Wats.
  western miterwort
Salsola kali L.
  prickly Russian thistle
Salsola paulsenii Litv.
  barbwire Russian thistle
Sarcobatus vermiculatus (Hook.) Torr.
  greasewood
Sarcocornia utahensis (Tidestrom) A.J. Scott
  Utah swampfire
Suaeda calceoliformis (Hook.) Moq.
  Pursh seepweed
Suaeda moquinii (Torr.) Greene
  Mojave seablite
Suaeda torreyana S. Wats.
  = Suaeda moquinii
Zuckia brandegei (Gray) Welsh & Stutz ex Welsh
  siltbush

CLUSIACEAE
Hypericum anagalloides Cham. & Schlecht.
  trailing St. Johnswort
Hypericum formosum ssp. scouleri (Hook.) C.L. Hitchc.
  = Hypericum scouleri ssp. scouleri
Hypericum scouleri Hook.
  Scouler's St. Johnswort
Hypericum scouleri ssp. scouleri Hook.
  Scouler's St. Johnswort

COMMELINACEAE
Commelina dianthifolia Delile
  birdbill dayflower
Commelina erecta L.
  whitemouth dayflower
Tradescantia occidentalis (Britt.) Smyth
  prairie spiderwort
Tradescantia pinetorum Greene
  pinewoods spiderwort

COMPOSITAE
Acamptopappus sphaerocephalus (Harvey & Gray ex Gray) Gray
  rayless goldenhead
Achillea lanulosa Nutt.
  = Achillea millefolium var. occidentalis
Achillea millefolium L.
  common yarrow
Achillea millefolium ssp. lanulosa (Nutt.) Piper
  = Achillea millefolium var. occidentalis
Achillea millefolium var. alpicola (Rydb.) Garrett
  common yarrow
Achillea millefolium var. lanulosa (Nutt.) Piper
  = Achillea millefolium var. occidentalis
Achillea millefolium var. occidentalis DC.
  western yarrow
Acourtia nana (Gray) Reveal & King
  dwarf desertpeony
Acourtia thurberi (Gray) Reveal & King
  Thurber's desertpeony
Acourtia wrightii (Gray) Reveal & King
  brownfoot
Acroptilon repens (L.) DC.
  hardheads
Adenophyllum cooperi (Gray) Strother
  Cooper's dogweed
Adenophyllum porophylloides (Gray) Strother
  San Felipe dogweed
Adenophyllum porophyllum (Cav.) Hemsl.
  poreleaf dogweed
Adenophyllum wrightii Gray
  Wright's dogweed
Ageratina herbacea (Gray) King & H.E. Robins.
  fragrant snakeroot
Ageratina lemmonii (B.L. Robins.) King & H.E. Robins.
  Lemmon's snakeroot
Ageratina paupercula (Gray) King & H.E. Robins.
  Santa Rita snakeroot
Ageratina rothrockii (Gray) King & H.E. Robins.
  Rothrock's snakeroot
Ageratina wrightii (Gray) King & H.E. Robins.
  Wright's snakeroot
Ageratum corymbosum Zuccagni
  flattop whiteweed
Agoseris arizonica Greene
  = Agoseris glauca var. laciniata
Agoseris aurantiaca (Hook.) Greene
  orange agoseris
Agoseris glauca (Pursh) Raf.
  pale agoseris
Agoseris heterophylla (Nutt.) Greene
  annual agoseris
Almutaster pauciflorus (Nutt.) A.& D. Love
Ambrosia acanthicarpa Hook.
  flatspine burr ragweed
Ambrosia ambrosioides (Cav.) Payne
  ambrosia leaf burr ragweed
Ambrosia aptera DC.
  = Ambrosia trifida var. texana
Ambrosia artemisiifolia L.
  annual ragweed
Ambrosia canescens (Benth.) Gray
  hairy ragweed
Ambrosia confertiflora DC.
  weakleaf burr ragweed
Ambrosia cordifolia (Gray) Payne
  Tucson burr ragweed
Ambrosia deltoidea (Torr.) Payne
  triangle burr ragweed
Ambrosia dumosa (Gray) Payne
  white burrobush
Ambrosia eriocentra (Gray) Payne
  woolly fruit burr ragweed
Ambrosia ilicifolia (Gray) Payne
  hollyleaf burr ragweed
Ambrosia psilostachya DC.
  Cuman ragweed
Ambrosia tomentosa Nutt.
  skeletonleaf burr ragweed
Ambrosia trifida L.
  great ragweed
Ambrosia trifida var. texana Scheele
  Texan great ragweed
Amphipappus fremontii Torr. & Gray
  Fremont's chaffbush
Anaphalis margaritacea (L.) Benth. & Hook. f.
  western pearlyeverlasting
Anisocoma acaulis Torr. & Gray
  scalebud
Antennaria arida E. Nels.
  = Antennaria rosea ssp. arida
Antennaria dioica var. kernensis Jepson
  = Antennaria rosea ssp. confinis
Antennaria marginata Greene
  whitemargin pussytoes
Antennaria microphylla Rydb.
  littleleaf pussytoes
Antennaria parvifolia Nutt.
  smallleaf pussytoes
Antennaria rosea Greene
  rosy pussytoes
Antennaria rosea ssp. arida (E. Nels.) Bayer
  rosy pussytoes
Antennaria rosea ssp. confinis (Greene) Bayer
  rosy pussytoes
Antennaria rosulata Rydb.
  Kaibab pussytoes
Antennaria umbrinella Rydb.
  umber pussytoes
Anthemis cotula L.
  stinking chamomile
Antheropeas lanosum (Gray) Rydb.
  white easterbonnets
Antheropeas wallacei (Gray) Rydb.
  woolly easterbonnets
Aphanostephus ramosissimus DC.
  plains dozedaisy
Arctium minus Bernh.
  lesser burrdock
Arnica chamissonis Less.
  chamisso arnica
Arnica cordifolia Hook.
  heartleaf arnica
Artemisia annua L.
  sweet annie
Artemisia biennis Willd.
  biennial wormwood
Artemisia bigelovii Gray
  Bigelow's sagebrush
Artemisia campestris L.
  field sagewort
Artemisia campestris ssp. pacifica (Nutt.) Hall & Clements
  Pacific wormwood
Artemisia cana Pursh
  silver sagebrush
Artemisia carruthii Wood ex Carruth.
  Carruth's sagewort
Artemisia dracunculoides Pursh
  = Artemisia dracunculus ssp. dracunculus
Artemisia dracunculus L.
  Russian tarragon
Artemisia dracunculus ssp. dracunculus L.
  wild tarragon
Artemisia filifolia Torr.
  sand sagebrush
Artemisia franserioides Greene
  ragweed sagebrush
Artemisia frigida Willd.
  fringed sagewort
Artemisia ludoviciana Nutt.
  Louisiana sagewort
Artemisia ludoviciana ssp. albula (Woot.) Keck
  white sagebrush
Artemisia ludoviciana ssp. ludoviciana Nutt.
  foothill sagewort
Artemisia ludoviciana ssp. mexicana (Willd. ex Spreng.) Keck
  Mexican white sagebrush
Artemisia ludoviciana ssp. redolens (Gray) Keck
  white sagebrush
Artemisia ludoviciana ssp. sulcata (Rydb.) Keck
  white sagebrush
Artemisia mexicana Willd. ex Spreng.
  = Artemisia ludoviciana ssp. mexicana
Artemisia nova A. Nels.
  black sagebrush
Artemisia pacifica Nutt.
  = Artemisia campestris ssp. pacifica
Artemisia pygmaea Gray
  pygmy sagebrush
Artemisia redolens Gray
  = Artemisia ludoviciana ssp. redolens
Artemisia spinescens D.C. Eat.
  bud sagebrush
Artemisia tridentata Nutt.
  big sagebrush
Aster ascendens Lindl.
  Chile aster
Aster bracteolatus Nutt. (pro sp.)
  bract aster
Aster coerulescens DC.
  = Aster praealtus var. coerulescens
Aster commutatus (Torr. & Gray) Gray
  = Aster falcatus var. commutatus
Aster eatonii (Gray) T.J. Howell
  Eaton's aster
Aster ericoides L.
  heath aster
Aster falcatus Lindl.
  cluster aster
Aster foliaceus Lindl. ex DC.
  alpine leafybract aster
Aster frondosus (Nutt.) Torr. & Gray
  = Brachyactis frondosa
Aster glaucodes Blake
  gray aster
Aster intricatus (Gray) Blake
  = Machaeranthera carnosa
Aster lemmonii Gray
  = Aster potosinus
Aster oregonus auct. non (Nutt.) Torr. & Gray
  = Aster eatonii
Aster pauciflorus Nutt.
  = Almutaster pauciflorus
Aster potosinus Gray
  Santa Rita Mountain aster
Aster praealtus Poir.
  willowleaf aster
Aster riparius Kunth
  = Machaeranthera riparia
Aster spinosus Benth.
  = Chloracantha spinosa
Aster subulatus Michx.
  annual saltmarsh aster
Aster wasatchensis (M.E. Jones) Blake
  Wasatch aster
Atrichoseris platyphylla (Gray) Gray
  parachute plant
Baccharis bigelovii Gray
  Bigelow's falsewillow
Baccharis brachyphylla Gray
  shortleaf baccharis
Baccharis emoryi Gray
  Emory's baccharis
Baccharis neglecta Britt.
  Rooseveltweed
Baccharis pteronioides DC.
  yerba de pasmo
Baccharis salicifolia (Ruiz & Pavon) Pers.
  mule's fat
Baccharis sarothroides Gray
  desertbroom
Baccharis sergiloides Gray
  squaw waterweed baccharis
Baccharis thesioides Kunth
  Arizona baccharis
Baccharis viminea DC.
  = Baccharis salicifolia
Baccharis wrightii Gray
  Wright's baccharis
Bahia absinthifolia Benth.
  hairyseed bahia
Bahia biternata Gray
  slimlobe bahia
Bahia dissecta (Gray) Britt.
  ragleaf bahia
Bahia oppositifolia (Nutt.) Gray
  = Picradeniopsis oppositifolia
Bahia pedata Gray
  bluntscale bahia
Bahia woodhousei (Gray) Gray
  = Picradeniopsis woodhousei
Baileya multiradiata Harvey & Gray ex Gray
  desert marigold
Baileya pauciradiata Harvey & Gray ex Gray
  laxflower
Baileya pleniradiata Harvey & Gray ex Gray
  woolly desert marigold
Balsamorhiza hookeri (Hook.) Nutt.
  Hooker's balsamroot
Balsamorhiza sagittata (Pursh) Nutt.
  arrowleaf balsamroot
Bebbia juncea (Benth.) Greene
  sweetbush
Berlandiera lyrata Benth.
  lyreleaf greeneyes
Bidens alba (L.) DC.
  romerillo
Bidens aurea (Ait.) Sherff
  Arizona beggarticks
Bidens bigelovii Gray
  Bigelow's beggarticks
Bidens bipinnata L.
  spanish-needles
Bidens cernua L.
  nodding beggartick
Bidens ferulifolia (Jacq.) DC.
  Apache beggarticks
Bidens frondosa L.
  devil's beggartick
Bidens heterosperma Gray
  Rocky Mountain beggarticks
Bidens laevis (L.) B.S.P.
  smooth beggartick
Bidens lemmonii Gray
  Lemmon's beggarticks
Bidens leptocephala Sherff
  fewflower beggarticks
Bidens pilosa L.
  Spanish needles
Bidens tenuisecta Gray
  slimlobe beggarticks
Brachyactis frondosa (Nutt.) Gray
  leafy rayless aster
Brickellia amplexicaulis B.L. Robins.
  earleaf brickellbush
Brickellia atractyloides Gray
  spearleaf brickellbush
Brickellia baccharidea Gray
  resinleaf brickellbush
Brickellia betonicifolia Gray
  betonyleaf brickellbush
Brickellia brachyphylla (Gray) Gray
  plumed brickellbush
Brickellia californica (Torr. & Gray) Gray
  California brickellbush
Brickellia chlorolepis (Woot. & Standl.) Shinners
  = Brickellia eupatorioides var. chlorolepis
Brickellia coulteri Gray
  Coulter's brickellbush
Brickellia desertorum Coville
Brickellia eupatorioides (L.) Shinners
  false boneset
Brickellia fendleri Gray
  Fendler's brickellbush
Brickellia floribunda Gray
  Chihuahuan brickellbush
Brickellia frutescens Gray
  shrubby brickellbush
Brickellia grandiflora (Hook.) Nutt.
  tasselflower brickellbush
Brickellia incana Gray
  woolly brickellbush
Brickellia lemmonii Gray
  Lemmon's brickellbush
Brickellia longifolia S. Wats.
  longleaf brickellbush
Brickellia microphylla (Nutt.) Gray
  littleleaf brickellbush
Brickellia multiflora Kellogg
  = Brickellia longifolia var. multiflora
Brickellia oblongifolia Nutt.
  Mojave brickellbush
Brickellia oblongifolia var. linifolia (D.C. Eat.) B.L. Robins.
  narrowleaf brickellbush
Brickellia parvula Gray
  Mt. Davis brickellbush
Brickellia pringlei Gray
  Pringle's brickellbush
Brickellia rusbyi Gray
  stinking brickellbush
Brickellia scabra (Gray) A. Nels. ex B.L. Robins.
  = Brickellia microphylla var. scabra
Brickellia simplex Gray
  Sonoran brickellbush
Brickellia squamulosa Gray
  Mule Mountain brickellbush
Brickellia venosa (Woot. & Standl.) B.L. Robins.
  veiny brickellbush
Cacalia decomposita Gray
  = Psacalium decompositum
Calycoseris parryi Gray
  yellow tackstem
Calycoseris wrightii Gray
  white tackstem
Carduus arvensis (L.) Robson
  = Cirsium arvense
Carduus nutans L.
  nodding plumeless thistle
Carminatia tenuiflora DC.
  plumeweed
Carphochaete bigelovii Gray
  Bigelow's bristlehead
Castalis tragus (Ait.) Norl.
  cape marigold
Centaurea americana Nutt.
  American star thistle
Centaurea biebersteinii DC.
  spotted knapweed
Centaurea calcitrapa L.
  red star thistle
Centaurea cyanus L.
  garden cornflower
Centaurea maculosa auct. non Lam.
  = Centaurea biebersteinii
Centaurea melitensis L.
  Maltese star thistle
Centaurea repens L.
  = Acroptilon repens
Centaurea rothrockii Greenm.
  Rothrock's knapweed
Centaurea salmantica L.
  = Mantisalca salmantica
Centaurea solstitialis L.
  yellow star thistle
Chaenactis carphoclinia Gray
  pebble pincushion
Chaenactis douglasii (Hook.) Hook. & Arn.
  Douglas' dustymaiden
Chaenactis fremontii Gray
  pincushion flower
Chaenactis macrantha D.C. Eat.
  bighead dustymaiden
Chaenactis stevioides Hook. & Arn.
  Steve's dustymaiden
Chaenactis xantiana Gray
  fleshcolor pincushion
Chaetopappa ericoides (Torr.) Nesom
  rose heath
Chamaechaenactis scaposa (Eastw.) Rydb.
  fullstem
Chaptalia alsophila Greene
  = Leibnitzia seemannii
Chaptalia leucocephala Greene
  = Leibnitzia seemannii
Chloracantha spinosa (Benth.) Nesom
  spiny chloracantha
Chrysanthemum coronarium L.
  crowndaisy
Chrysanthemum leucanthemum L.
  = Leucanthemum vulgare
Chrysothamnus depressus Nutt.
  longflower rabbitbrush
Chrysothamnus greenei (Gray) Greene
  Greene's rabbitbrush
Chrysothamnus linifolius Greene
  spearleaf rabbitbrush
Chrysothamnus molestus (Blake) L.C. Anders.
  Arizona rabbitbrush
Chrysothamnus nauseosus (Pallas ex Pursh) Britt.
  = Ericameria nauseosa 
Chrysothamnus paniculatus (Gray) Hall
  = Ericameria paniculata
Chrysothamnus parryi (Gray) Greene
  = Ericameria parryi var. parryi
Chrysothamnus pulchellus (Gray) Greene
  southwestern rabbitbrush
Chrysothamnus teretifolius (Dur. & Hilg.) Hall
  = Ericameria teretifolia
Chrysothamnus viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Cirsium arizonicum (Gray) Petrak
  Arizona thistle
Cirsium arvense (L.) Scop.
  Canadian thistle
Cirsium bipinnatum (Eastw.) Rydb.
  = Cirsium calcareum
Cirsium calcareum (M.E. Jones) Woot. & Standl.
  Cainville thistle
Cirsium chellyense Moore & Frankton
  queen thistle
Cirsium chuskaense Moore & Frankton
  monarch thistle
Cirsium coloradense (Rydb.) Cockerell
  = Cirsium tioganum var. coloradense
Cirsium drummondii Torr. & Gray
  dwarf thistle
Cirsium foliosum (Hook.) DC.
  elk thistle
Cirsium grahamii Gray
  Graham's thistle
Cirsium navajoense Moore & Frankton
  Navajo thistle
Cirsium neomexicanum Gray
  New Mexico thistle
Cirsium ochrocentrum Gray
  yellowspine thistle
Cirsium parryi (Gray) Petrak
  Parry's thistle
Cirsium pulcherrimum (Rydb.) K. Schum.
  Wyoming thistle
Cirsium rothrockii (Gray) Petrak
  Rothrock's thistle
Cirsium rydbergii Petrak
  Rydberg's thistle
Cirsium tioganum (Congd.) Petrak
  stemless thistle
Cirsium undulatum (Nutt.) Spreng.
  wavyleaf thistle
Cirsium virginense Welsh
  virgin thistle
Cirsium vulgare (Savi) Ten.
  bull thistle
Cirsium wheeleri (Gray) Petrak
  Wheeler's thistle
Cirsium wrightii Gray
  Wright's thistle
Cnicus benedictus L.
  blessed thistle
Conyza bonariensis (L.) Cronq.
  asthmaweed
Conyza canadensis (L.) Cronq.
  Canadian horseweed
Conyza coulteri Gray
  = Laennecia coulteri
Conyza schiedeana (Less.) Cronq.
  = Laennecia schiedeana
Conyza sophiifolia Kunth
  = Laennecia sophiifolia
Coreocarpus arizonicus (Gray) Blake
  little lemonhead
Coreopsis atkinsoniana Dougl. ex Lindl.
  = Coreopsis tinctoria var. atkinsoniana
Coreopsis californica (Nutt.) H.K. Sharsmith
  California tickseed
Coreopsis douglasii (DC.) Hall
  Douglas' tickseed
Coreopsis tinctoria Nutt.
  golden tickseed
Cosmos bipinnatus Cav.
  garden cosmos
Cosmos parviflorus (Jacq.) Pers.
  southwestern cosmos
Cotula australis (Sieber) Hook. f.
  Australian waterbuttons
Cotula coronopifolia L.
  common brassbuttons
Crepis acuminata Nutt.
  longleaf hawksbeard
Crepis glauca (Nutt.) Torr. & Gray
  = Crepis runcinata ssp. glauca
Crepis intermedia Gray
  limestone hawksbeard
Crepis occidentalis Nutt.
  largeflower hawksbeard
Crepis runcinata (James) Torr. & Gray
  fiddleleaf hawksbeard
Cynara scolymus L.
  globe artichoke
Dicoria brandegei Gray
  = Dicoria canescens ssp. brandegei
Dicoria canescens Gray
  desert twinbugs
Dimorphotheca aurantiaca DC., non Horton
  = Castalis tragus
Dugaldia hoopesii (Gray) Rydb.
  = Hymenoxys hoopesii
Dyssodia acerosa DC.
  = Thymophylla acerosa
Dyssodia concinna (Gray) B.L. Robins.
  = Thymophylla concinna
Dyssodia cooperi Gray
  = Adenophyllum cooperi
Dyssodia neomexicana (Gray) B.L. Robins.
  = Adenophyllum wrightii
Dyssodia papposa (Vent.) A.S. Hitchc.
  fetid marigold
Dyssodia pentachaeta (DC.) B.L. Robins.
  = Thymophylla pentachaeta var. pentachaeta
Dyssodia porophylloides Gray
  = Adenophyllum porophylloides
Eclipta alba (L.) Hassk.
  = Eclipta prostrata
Eclipta prostrata (L.) L.
  false daisy
Encelia californica Nutt.
  California brittlebush
Encelia farinosa Gray ex Torr.
  goldenhills
Encelia frutescens (Gray) Gray
  button brittlebush
Encelia virginensis A. Nels.
  Virgin River brittlebush
Enceliopsis argophylla (D.C. Eat.) A. Nels.
  silverleaf sunray
Enceliopsis nudicaulis (Gray) A. Nels.
  nakedstem sunray
Engelmannia pinnatifida Gray ex Nutt.
  Engelmann's daisy
Ericameria brachylepis (Gray) Hall
  chaparral heathgoldenrod
Ericameria cervina (S. Wats.) Rydb.
  deer heathgoldenrod
Ericameria cuneata (Gray) McClatchie
  cliff heathgoldenrod
Ericameria laricifolia (Gray) Shinners
  turpentine bush
Ericameria linearifolia (DC.) Urbatsch & Wussow
  narrowleaf heathgoldenrod
Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird
  rabbitbrush
Ericameria paniculata (Gray) Rydb.
Ericameria parryi (Gray) Nesom
Ericameria suffruticosa (Nutt.) Nesom
  singlehead heathgoldenrod
Ericameria teretifolia (Dur. & Hilg.) Jepson
Ericameria watsonii (Gray) Nesom
  Watson's heathgoldenrod
Erigeron aphanactis (Gray) Greene
  rayless shaggy fleabane
Erigeron arizonicus Gray
  Arizona fleabane
Erigeron bellidiastrum Nutt.
  western daisy fleabane
Erigeron caespitosus Nutt.
  tufted fleabane
Erigeron canadensis
  = Conyza canadensis
Erigeron canus Gray
  hoary fleabane
Erigeron colomexicanus A. Nels.
  running fleabane
Erigeron compactus Blake
  fernleaf fleabane
Erigeron compositus Pursh
  cutleaf daisy
Erigeron concinnus (Hook. & Arn.) Torr. & Gray
  Navajo fleabane
Erigeron consimilis Cronq.
  foothill fleabane
Erigeron divergens Torr. & Gray
  spreading fleabane
Erigeron eatonii Gray
  Eaton's fleabane
Erigeron eriophyllus Gray
  = Laennecia eriophylla
Erigeron eximius Greene
  sprucefir fleabane
Erigeron flagellaris Gray
  trailing fleabane
Erigeron formosissimus Greene
  beautiful fleabane
Erigeron gilensis Woot. & Standl.
  Gila fleabane
Erigeron kuschei Eastw.
  Chiricahua fleabane
Erigeron lemmonii Gray
  Lemmon's fleabane
Erigeron lobatus A. Nels.
  lobed fleabane
Erigeron macranthus Nutt.
  = Erigeron speciosus var. macranthus
Erigeron modestus Gray
  plains fleabane
Erigeron neomexicanus Gray
  New Mexico fleabane
Erigeron oreophilus Greenm.
  chaparral fleabane
Erigeron oxyphyllus Greene
  wand fleabane
Erigeron piscaticus Nesom
  Fish Creek fleabane
Erigeron platyphyllus Greene
  = Erigeron vreelandii
Erigeron pringlei Gray
  Pringle's fleabane
Erigeron pumilus Nutt.
  shaggy fleabane
Erigeron pusillus Nutt.
  = Conyza canadensis var. pusilla
Erigeron rusbyi Gray
  = Erigeron arizonicus
Erigeron scopulinus Nesom & Roth
  Winn Falls fleabane
Erigeron simplex Greene
  onestem fleabane
Erigeron speciosus (Lindl.) DC.
  aspen fleabane
Erigeron superbus Greene ex Rydb.
  = Erigeron eximius
Erigeron tener (Gray) Gray
  slender fleabane
Erigeron ursinus D.C. Eat.
  Bear River fleabane
Erigeron utahensis Gray
  Utah fleabane
Erigeron vreelandii Greene
  Vreeland's erigeron
Eriophyllum confertiflorum (DC.) Gray
  yellow yarrow
Eriophyllum lanosum (Gray) Gray
  = Antheropeas lanosum
Eriophyllum multicaule (DC.) Gray
  manystem woollysunflower
Eriophyllum pringlei Gray
  Pringle's woollysunflower
Eriophyllum wallacei (Gray) Gray
  = Antheropeas wallacei
Eupatorium bigelovii Gray
  Bigelow's thoroughwort
Eupatorium greggii Gray
  palmleaf thoroughwort
Eupatorium herbaceum (Gray) Greene
  = Ageratina herbacea
Eupatorium lemmonii B.L. Robins.
  = Ageratina lemmonii
Eupatorium maculatum L.
  spotted joepyeweed
Eupatorium pauperculum Gray
  = Ageratina paupercula
Eupatorium pycnocephalum Less.
  lavender thoroughwort
Eupatorium rothrockii Gray
  = Ageratina rothrockii
Eupatorium solidaginifolium Gray
  shrubby thoroughwort
Eupatorium wrightii Gray
  = Ageratina wrightii
Euryops multifidus (Thunb.) DC.
  hawk's eye
Euthamia occidentalis Nutt.
  western goldentop
Evax multicaulis DC.
  = Evax verna var. verna
Evax verna Raf.
  spring pygmycudweed
Filago arizonica Gray
  Arizona cottonrose
Filago californica Nutt.
  California cottonrose
Filago depressa Gray
  dwarf cottonrose
Flaveria campestris J.R. Johnston
  alkali yellowtops
Flaveria macdougalii Theroux, Pinkava & Keil
  Macdougal's yellowtops
Flaveria trinervia (Spreng.) C. Mohr
  clustered yellowtops
Flourensia cernua DC.
  American tarwort
Franseria
  = Ambrosia
Gaillardia arizonica Gray
  Arizona blanketflower
Gaillardia multiceps Greene
  onion blanketflower
Gaillardia parryi Greene
  Parry's blanketflower
Gaillardia pinnatifida Torr.
  red dome blanketflower
Gaillardia pulchella Foug.
  firewheel
Galinsoga parviflora Cav.
  gallantsoldier
Gamochaeta purpurea (L.) Cabrera
  spoonleaf purple everlasting
Geraea canescens Torr. & Gray
  hairy desertsunflower
Glyptopleura marginata D.C. Eat.
  carveseed
Glyptopleura setulosa Gray
  holy dandelion
Gnaphalium arizonicum Gray
  = Pseudognaphalium arizonicum
Gnaphalium chilense Spreng.
  = Pseudognaphalium stramineum
Gnaphalium exilifolium A. Nels.
Gnaphalium leucocephalum Gray
  = Pseudognaphalium leucocephalum
Gnaphalium luteoalbum L.
  = Pseudognaphalium luteoalbum
Gnaphalium margaritaceum L.
  = Anaphalis margaritacea
Gnaphalium palustre Nutt.
  western marsh cudweed
Gnaphalium pringlei Gray
  = Pseudognaphalium pringlei
Gnaphalium purpureum L.
  = Gamochaeta purpurea
Gnaphalium wrightii Gray
Greenella arizonica Gray
  = Gutierrezia arizonica
Greenella discoidea Gray
  = Gutierrezia wrightii
Grindelia aphanactis Rydb.
  = Grindelia nuda var. aphanactis
Grindelia arizonica Gray
  Arizona gumweed
Grindelia gymnospermoides (Gray) Ruffin
  = Xanthocephalum gymnospermoides
Grindelia laciniata Rydb.
  cutleaf gumweed
Grindelia nuda Wood
  curlytop gumweed
Grindelia nuda var. aphanactis (Rydb.) Nesom
  curlytop gumweed
Grindelia oxylepis Greene
  Mexican gumweed
Grindelia papposa Nesom & Suh
  grindelia
Grindelia squarrosa (Pursh) Dunal
  curlycup gumweed
Guardiola platyphylla Gray
  Apache plant
Gutierrezia arizonica (Gray) M.A. Lane
  Arizona snakeweed
Gutierrezia microcephala (DC.) Gray
  threadleaf snakeweed
Gutierrezia sarothrae (Pursh) Britt. & Rusby
  broom snakeweed
Gutierrezia serotina Greene
  late snakeweed
Gutierrezia sphaerocephala Gray
  roundleaf snakeweed
Gutierrezia wrightii Gray
  Wright's snakeweed
Gymnosperma glutinosum (Spreng.) Less.
  gumhead
Haplopappus acaulis (Nutt.) Gray
  = Stenotus acaulis var. acaulis
Haplopappus acradenius ssp. eremophilus (Greene) Hall
  = Isocoma acradenia var. eremophila
Haplopappus armerioides (Nutt.) Gray
  = Stenotus armerioides var. armerioides
Haplopappus cervinus S. Wats.
  = Ericameria cervina
Haplopappus ciliatus (Nutt.) DC.
  = Grindelia papposa
Haplopappus drummondii (Torr. & Gray) Blake
  = Isocoma drummondii
Haplopappus heterophyllus (Gray) Blake
  = Isocoma pluriflora
Haplopappus junceus Greene
  = Machaeranthera juncea
Haplopappus laricifolius Gray
  = Ericameria laricifolia
Haplopappus linearifolius DC.
  = Ericameria linearifolia
Haplopappus nuttallii Torr. & Gray
  = Machaeranthera grindelioides var. grindelioides
Haplopappus parryi Gray
  = Solidago parryi
Haplopappus ravenii R.C. Jackson
  = Machaeranthera gracilis
Haplopappus salicinus Blake
  = Hesperodoria scopularum
Haplopappus scopulorum (M.E. Jones) Blake
  = Hesperodoria scopularum
Haplopappus spinulosus (Pursh) DC.
  = Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida
Haplopappus suffruticosus (Nutt.) Gray
  = Ericameria suffruticosa
Haplopappus tenuisectus (Greene) Blake
  = Isocoma tenuisecta
Haplopappus watsonii Gray
  = Ericameria watsonii
Hedypnois cretica (L.) Dum.-Cours.
  cretanweed
Helenium arizonicum Blake
  Arizona sneezeweed
Helenium autumnale L.
  common sneezeweed
Helenium hoopesii Gray
  = Hymenoxys hoopesii
Helenium thurberi Gray
  Thurber's sneezeweed
Helianthella microcephala (Gray) Gray
  purpledisk helianthella
Helianthella parryi Gray
  Parry's dwarfsunflower
Helianthella quinquenervis (Hook.) Gray
  fivenerve helianthella
Helianthus annuus L.
  common sunflower
Helianthus anomalus Blake
  western sunflower
Helianthus arizonensis R.C. Jackson
  Arizona sunflower
Helianthus ciliaris DC.
  Texas blueweed
Helianthus deserticola Heiser
  = Helianthus anomalus
Helianthus niveus (Benth.) Brandeg.
  showy sunflower
Helianthus nuttallii Torr. & Gray
  Nuttall's sunflower
Helianthus pauciflorus Nutt.
  stiff sunflower
Helianthus petiolaris Nutt.
  prairie sunflower
Heliomeris ciliata (Robins. & Greenm.) Yates
  hairy falsegoldeneye
Heliomeris longifolia (Robins. & Greenm.) Cockerell
  longleaf falsegoldeneye
Heliomeris multiflora Nutt.
  showy goldeneye
Heliopsis parvifolia Gray
  mountain oxeye
Hemizonia kelloggii Greene
  Kellogg's tarweed
Hemizonia pungens (Hook. & Arn.) Torr. & Gray
  common spikeweed
Hesperodoria scopularum (M.E. Jones) Greene
  Grand Canyon glowweed
Heterosperma pinnatum Cav.
  wingpetal
Heterotheca fulcrata (Greene) Shinners
  rockyscree falsegoldenaster
Heterotheca grandiflora Nutt.
  telegraphweed
Heterotheca latifolia Buckl.
  = Heterotheca subaxillaris
Heterotheca psammophila Wagenkn.
  = Heterotheca subaxillaris
Heterotheca rutteri (Rothrock) Shinners
  Rutter's falsegoldenaster
Heterotheca subaxillaris (Lam.) Britt. & Rusby
  camphorweed
Heterotheca villosa (Pursh) Shinners
  hairy goldenaster
Heterotheca viscida (Gray) Harms
  cliff falsegoldenaster
Hieracium carneum Greene
  Huachuca hawkweed
Hieracium fendleri Schultz-Bip.
  yellow hawkweed
Hieracium lemmonii Gray
  Lemmon's hawkweed
Hieracium pringlei Gray
  Pringle's hawkweed
Hieracium rusbyi Greene
  Rusby's hawkweed
Hymenoclea monogyra Torr. & Gray ex Gray
  singlewhorl burrobush
Hymenoclea salsola Torr. & Gray ex Gray
  white burrobush
Hymenopappus filifolius Hook.
  fineleaf hymenopappus
Hymenopappus flavescens Gray
  collegeflower
Hymenopappus mexicanus Gray
  Mexican woollywhite
Hymenopappus newberryi (Gray) I.M. Johnston
  Newberry's hymenopappus
Hymenopappus radiatus Rose
  ray hymenopappus
Hymenothrix loomisii Blake
  Loomis' thimblehead
Hymenothrix wislizeni Gray
  TransPecos thimblehead
Hymenothrix wrightii Gray
  Wright's thimblehead
Hymenoxys acaulis var. arizonica (Greene) Parker
  = Tetraneuris acaulis var. arizonica
Hymenoxys ambigens (Blake) Bierner
Hymenoxys argentea var. ivesiana (Greene) Cronq.
  = Tetraneuris ivesiana
Hymenoxys bigelovii (Gray) Parker
  Bigelow's rubberweed
Hymenoxys brandegei Porter ex Gray
  = Tetraneuris brandegei
Hymenoxys cooperi (Gray) Cockerell
  Cooper's hymenoxys
Hymenoxys helenioides (Rydb.) Cockerell
  Intermountain hymenoxys
Hymenoxys hoopesii (Gray) Bierner
  yerba del lobo
Hymenoxys ivesiana (Greene) Parker
  = Tetraneuris ivesiana
Hymenoxys lemmonii (Greene) Cockerell
  Lemmon's rubberweed
Hymenoxys microcephala (Gray) Bierner
Hymenoxys odorata DC.
  bitter rubberweed
Hymenoxys quinquesquamata Rydb.
  rincon rubberweed
Hymenoxys richardsonii (Hook.) Cockerell
  pingue hymenoxys
Hymenoxys rusbyi (Gray) Cockerell
  Rusby's rubberweed
Hymenoxys subintegra Cockerell
  Arizona rubberweed
Isocoma acradenia (Greene) Greene
  alkali jimmyweed
Isocoma drummondii (Torr. & Gray) Greene
  Drummond's jimmyweed
Isocoma pluriflora (Torr. & Gray) Greene
  southern jimmyweed
Isocoma tenuisecta Greene
  burroweed
Isocoma wrightii (Gray) Rydb.
  = Isocoma pluriflora
Iva acerosa (Nutt.) R.C. Jackson
  copperweed
Iva ambrosiifolia (Gray) Gray
  ragged marshelder
Iva axillaris Pursh
  povertyweed
Iva dealbata Gray
  woolly marshelder
Iva xanthifolia Nutt.
  giant sumpweed
Krigia biflora (Walt.) Blake
  twoflower dwarfdandelion
Lactuca graminifolia Michx.
  grassleaf lettuce
Lactuca ludoviciana (Nutt.) Riddell
  biannual lettuce
Lactuca pulchella (Pursh) DC.
  = Lactuca tatarica var. pulchella
Lactuca saligna L.
  willowleaf lettuce
Lactuca scariola L.
  = Lactuca serriola
Lactuca serriola L.
  prickly lettuce
Lactuca tatarica (L.) C.A. Mey.
  blue lettuce
Lactuca tatarica var. pulchella (Pursh) Breitung
  blue lettuce
Laennecia coulteri (Gray) Nesom
  conyza
Laennecia eriophylla (Gray) Nesom
  Cochise marshtail
Laennecia schiedeana (Less.) Nesom
  pineland marshtail
Laennecia sophiifolia (Kunth) Nesom
  leafy marshtail
Lagascea decipiens Hemsl.
  doll's head
Lapsana communis L.
  common nipplewort
Lasianthaea podocephala (Gray) K. Becker
  San Pedro daisy
Lasthenia californica DC. ex Lindl.
  California goldfields
Lasthenia chrysostoma (Fisch. & C.A. Mey.) Greene
  = Lasthenia californica
Layia glandulosa (Hook.) Hook. & Arn.
  whitedaisy tidytips
Leibnitzia seemannii (Schultz-Bip.) Nesom
  Seeman's sunbonnets
Leontodon hirtus L.
  rough hawkbit
Leontodon nudicaulis (L.) Banks ex Schinz & R. Keller
  = Leontodon hirtus
Lepidospartum squamatum (Gray) Gray
  California broomsage
Lessingia lemmonii Gray
  Lemmon's vinegarweed
Leucanthemum leucanthemum (L.) Rydb.
  = Leucanthemum vulgare
Leucanthemum vulgare Lam.
  oxeyedaisy
Leucelene ericoides (Torr.) Greene
  = Chaetopappa ericoides
Liatris punctata Hook.
  dotted gayfeather
Lygodesmia arizonica S. Tomb
  Arizona skeletonplant
Lygodesmia grandiflora (Nutt.) Torr. & Gray
  largeflower skeletonplant
Lygodesmia juncea (Pursh) D. Don ex Hook.
  rush skeletonplant
Lygodesmia spinosa Nutt.
  = Stephanomeria spinosa
Machaeranthera aquifolia Greene ex Woot. & Standl.
  = Machaeranthera bigelovii var. bigelovii
Machaeranthera arida B.L. Turner & Horne
  arid tansyaster
Machaeranthera arizonica Jackson & Johnston
  = Machaeranthera arida
Machaeranthera asteroides var. asteroides (Torr.) Greene
  New Mexico tansyaster
Machaeranthera bigelovii (Gray) Greene
  Bigelow's tansyaster
Machaeranthera canescens (Pursh) Gray
  hoary aster
Machaeranthera carnosa (Gray) Nesom
  shrubby alkali aster
Machaeranthera coulteri (Gray) B.L. Turner & Horne
  Silver Lake daisy
Machaeranthera gracilis (Nutt.) Shinners
  slender goldenweed
Machaeranthera grindelioides (Nutt.) Shinners
  rayless aster
Machaeranthera juncea (Greene) Shinners
  rush bristleweed
Machaeranthera linearis Greene
  = Machaeranthera canescens ssp. glabra var. glabra
Machaeranthera mexicana B.L. Turner & Horne
  = Psilactis gentryi
Machaeranthera mucronata Greene
  = Machaeranthera bigelovii var. mucronata
Machaeranthera parviflora Gray
  smallflower tansyaster
Machaeranthera pinnatifida (Hook.) Shinners
  lacy tansyaster
Machaeranthera riparia (Kunth) A.G. Jones
  Chiricahua Mountain tansyaster
Machaeranthera tagetina Greene
  mesa tansyaster
Machaeranthera tanacetifolia (Kunth) Nees
  tanseyleaf aster
Machaeranthera tephrodes (Gray) Greene
  = Machaeranthera canescens ssp. canescens var. incana
Madia glomerata Hook.
  mountain tarweed
Malacothrix californica var. glabrata Gray ex D.C. Eat.
  = Malacothrix glabrata
Malacothrix clevelandii Gray
  Cleveland's desertdandelion
Malacothrix coulteri Harvey & Gray
  snake's head
Malacothrix fendleri Gray
  Fendler's desertdandelion
Malacothrix glabrata (Gray ex D.C. Eat.) Gray
  smooth desertdandelion
Malacothrix saxatilis (Nutt.) Torr. & Gray
  cliffaster
Malacothrix sonchoides (Nutt.) Torr. & Gray
  sowthistle desertdandelion
Malacothrix sonorae W.S. Davis & Raven
  Sonoran desertdandelion
Malacothrix stebbinsii W.S. Davis & Raven
  Stebbins' desertdandelion
Malacothrix torreyi Gray
  Torrey's desertdandelion
Mantisalca salmantica (L.) Briq. & Cavillier
  dagger flower
Matricaria chamomilla L. 1755 & 1763, non 1753
  = Matricaria recutita
Matricaria courrantiana DC.
  crown mayweed
Matricaria discoidea DC.
  disc mayweed
Matricaria matricarioides (Less.) Porter
  = Matricaria discoidea
Matricaria recutita L.
  mayweed
Melampodium leucanthum Torr. & Gray
  plains blackfoot
Melampodium longicorne Gray
  Arizona blackfoot
Melampodium strigosum Stuessy
  shaggy blackfoot
Microseris heterocarpa (Nutt.) Chambers
  = Stebbinoseris heterocarpa
Microseris linearifolia (Nutt.) Schultz-Bip.
  = Uropappus linearifolius
Monoptilon bellidiforme Torr. & Gray ex Gray
  daisy desertstar
Monoptilon bellioides (Gray) Hall
  Mojave desertstar
Odontotrichum decompositum (Gray) Rydb.
  = Psacalium decompositum
Onopordum acanthium L.
  Scotch cottonthistle
Palafoxia arida B.L. Turner & Morris
  desert palafox
Parthenice mollis Gray
  annual monsterwort
Parthenium confertum Gray
  Gray's feverfew
Parthenium incanum Kunth
  mariola
Pectis angustifolia Torr.
  narrowleaf pectis
Pectis angustifolia var. angustifolia Torr.
  lemonscent
Pectis cylindrica (Fern.) Rydb.
  Sonoran cinchweed
Pectis filipes Harvey & Gray
  fivebract cinchweed
Pectis imberbis Gray
  beardless cinchweed
Pectis linifolia L.
  romero macho
Pectis longipes Gray
  longstalk cinchweed
Pectis papposa Harvey & Gray
  cinchweed fetidmarigold
Pectis prostrata Cav.
  spreading cinchweed
Pectis rusbyi Greene ex Gray
  Rusby's cinchweed
Pentzia incana (Thunb.) Kuntze
  African sheepbush
Perezia nana Gray
  = Acourtia nana
Perezia thurberi Gray
  = Acourtia thurberi
Perezia wrightii Gray
  = Acourtia wrightii
Pericome caudata Gray
  mountain leaftail
Perityle ajoensis T.K. Todsen
  Ajo rockdaisy
Perityle californica Benth.
  California rockdaisy
Perityle ciliata (L.H. Dewey) Rydb.
  fringed rockdaisy
Perityle cochisensis (Niles) A. Powell
  Cochise rockdaisy
Perityle congesta (M.E. Jones) Shinners
  compact rockdaisy
Perityle coronopifolia Gray
  Arizona rockdaisy
Perityle dissecta (Torr.) Gray
  dissected rockdaisy
Perityle emoryi Torr.
  Emory's rocklily
Perityle gilensis (M.E. Jones) J.F. Macbr.
  Fish Creek rockdaisy
Perityle gracilis (M.E. Jones) Rydb.
  grassleaf rockdaisy
Perityle lemmonii (Gray) J.F. Macbr.
  Lemmon's rockdaisy
Perityle microglossa Benth.
  shortray rockdaisy
Perityle saxicola (Eastw.) Shinners
  Roosevelt Dam rockdaisy
Perityle tenella (M.E. Jones) J.F. Macbr.
  Springdale rockdaisy
Petradoria pumila (Nutt.) Greene
  grassy rockgoldenrod
Peucephyllum schottii Gray
  Schott's pygmycedar
Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britt.
  oppositeleaf bahia
Picradeniopsis woodhousei (Gray) Rydb.
  Woodhouse's bahia
Pinaropappus roseus (Less.) Less.
  white rocklettuce
Platyschkuhria integrifolia (Gray) Rydb.
  oblongleaf bahia
Pleurocoronis pluriseta (Gray) King & H.E. Robins.
  bush arrowleaf
Pluchea odorata (L.) Cass.
  sweetscent
Pluchea odorata var. odorata (L.) Cass.
  sweetscent
Pluchea purpurascens (Sw.) DC.
  = Pluchea odorata var. odorata
Pluchea sericea (Nutt.) Coville
  arrowweed
Plummera ambigens Blake
  = Hymenoxys ambigens
Plummera floribunda Gray
  = Hymenoxys microcephala
Porophyllum gracile Benth.
  slender poreleaf
Porophyllum ruderale (Jacq.) Cass.
  yerba porosa
Prenanthella exigua (Gray) Rydb.
  brightwhite
Prionopsis ciliata (Nutt.) Nutt.
  = Grindelia papposa
Psacalium decompositum (Gray) H.E. Robins. & Brett.
  maturique
Psathyrotes annua (Nutt.) Gray
  annual psathyrotes
Psathyrotes pilifera Gray
  hairybeast turtleback
Psathyrotes ramosissima (Torr.) Gray
  velvet turtleback
Pseudognaphalium arizonicum (Gray) A. Anderb.
Pseudognaphalium canescens (DC.) W.A. Weber
Pseudognaphalium leucocephalum (Gray) A. Anderb.
Pseudognaphalium luteoalbum (L.) Hilliard & Burtt
Pseudognaphalium pringlei (Gray) A. Anderb.
Pseudognaphalium stramineum (Kunth) W.A. Weber
Pseudognaphalium viscosum (Kunth) W.A. Weber
Psilactis asteroides Gray
Psilactis gentryi (Standl.) Morgan
Psilostrophe cooperi (Gray) Greene
  whitestem paperflower
Psilostrophe sparsiflora (Gray) A. Nels.
  greenstem paperflower
Psilostrophe tagetina (Nutt.) Greene
  woolly paperflower
Pyrrhopappus pauciflorus (D. Don) DC.
  desertchicory
Rafinesquia californica Nutt.
  California plumseed
Rafinesquia neomexicana Gray
  New Mexico plumseed
Ratibida columnifera (Nutt.) Woot. & Standl.
  upright prairie coneflower
Ratibida tagetes (James) Barnh.
  green prairie coneflower
Rudbeckia laciniata L.
  cutleaf coneflower
Sanvitalia abertii Gray
  Albert's creeping zinnia
Schkuhria anthemoidea (DC.) Coult.
  Wright's false threadleaf
Schkuhria multiflora Hook. & Arn.
  manyflower false threadleaf
Schkuhria wislizeni Gray
  Wislizenus' false threadleaf
Senecio actinella Greene
  Flagstaff ragwort
Senecio arizonicus Greene
  Arizona ragwort
Senecio bigelovii Gray
  nodding ragwort
Senecio bigelovii var. hallii Gray
  Hall's ragwort
Senecio cardamine Greene
  bittercress ragwort
Senecio carlomasonii B.L. Turner & T.M. Barkl.
  Carl Mason's ragwort
Senecio cynthioides Greene
  White Mountain ragwort
Senecio douglasii DC.
  = Senecio flaccidus var. douglasii
Senecio eremophilus Richards.
  desert groundsel
Senecio flaccidus Less.
  threadleaf ragwort
Senecio franciscanus Greene
  San Francisco Peaks ragwort
Senecio hartianus Heller
  Hart's ragwort
Senecio huachucanus Gray
  = Senecio multidentatus var. huachucanus
Senecio lemmonii Gray
  Lemmon's ragwort
Senecio mohavensis Gray
  Mojave ragwort
Senecio multicapitatus Greenm. ex Rydb.
  = Senecio spartioides var. multicapitatus
Senecio multidentatus Schultz-Bip. ex Hemsl.
  Huachuca Mountain ragwort
Senecio multilobatus Torr. & Gray ex Gray
  lobeleaf groundsel
Senecio mutabilis Greene
  = Senecio neomexicanus var. mutabilis
Senecio neomexicanus Gray
  New Mexico groundsel
Senecio parryi Gray
  mountain ragwort
Senecio plattensis Nutt.
  prairie groundsel
Senecio quercetorum Greene
  Oak Creek ragwort
Senecio riddellii Torr. & Gray
  Riddell's ragwort
Senecio salignus DC.
  willow ragwort
Senecio seemanii auct. non Schultz-Bip. ex Seem.
  = Senecio carlomasonii
Senecio spartioides Torr. & Gray
  broom groundsel
Senecio vulgaris L.
  common groundsel
Senecio werneriifolius (Gray) Gray
  hoary groundsel
Senecio wootonii Greene
  Wooton's ragwort
Silybum marianum (L.) Gaertn.
  blessed milkthistle
Simsia exaristata Gray
  = Simsia lagasceiformis
Simsia lagasceiformis DC.
  annual bushsunflower
Solidago altissima L.
  = Solidago canadensis var. scabra
Solidago canadensis L.
  Canada goldenrod
Solidago decumbens Greene
  = Solidago simplex ssp. simplex var. nana
Solidago missouriensis Nutt.
  Missouri goldenrod
Solidago multiradiata Ait.
  mountain goldenrod
Solidago nana Nutt.
  baby goldenrod
Solidago parryi (Gray) Greene
  Parry's goldenrod
Solidago simplex Kunth
  Mt. Albert goldenrod
Solidago sparsiflora Gray
  = Solidago velutina
Solidago spectabilis (D.C. Eat.) Gray
  Nevada goldenrod
Solidago velutina DC.
  threenerve goldenrod
Solidago wrightii Gray
  Wright's goldenrod
Sonchus asper (L.) Hill
  spiny sowthistle
Sonchus oleraceus L.
  common sowthistle
Stebbinoseris heterocarpa (Nutt.) Chambers
Stenotopsis linearifolia (DC.) Rydb.
  = Ericameria linearifolia
Stenotus acaulis (Nutt.) Nutt.
  stemless mock goldenweed
Stenotus armerioides Nutt.
  thrift mock goldenweed
Stephanomeria exigua Nutt.
  small wirelettuce
Stephanomeria parryi Gray
  Parry's wirelettuce
Stephanomeria pauciflora (Torr.) A. Nels.
  brownplume wirelettuce
Stephanomeria schottii Gray
  Schott's wirelettuce
Stephanomeria spinosa (Nutt.) S. Tomb
  thorn skeletonweed
Stephanomeria tenuifolia (Raf.) Hall
  narrowleaf wirelettuce
Stephanomeria thurberi Gray
  Thurber's wirelettuce
Stevia lemmonii (Gray) Gray
  Lemmon's candyleaf
Stevia micrantha Lag.
  annual candyleaf
Stevia plummerae Gray
  Plummer's candyleaf
Stevia serrata Cav.
  sawtooth candyleaf
Stevia viscida Kunth
  viscid candyleaf
Stylocline gnaphalioides Nutt.
  mountain neststraw
Stylocline micropoides Gray
  woollyhead neststraw
Stylocline sonorensis Wiggins
  Sonoran neststraw
Syntrichopappus fremontii Gray
  yellowray Fremontsgold
Tagetes lemmonii Gray
  Lemmon's marigold
Tagetes micrantha Cav.
  licorice marigold
Tanacetum vulgare L.
  common tansy
Taraxacum laevigatum (Willd.) DC.
  rock dandelion
Taraxacum lyratum (Ledeb.) DC.
  harp dandelion
Taraxacum officinale G.H. Weber ex Wiggers
  common dandelion
Tessaria sericea (Nutt.) Shinners
  = Pluchea sericea
Tetradymia argyraea Munz & Roos
  striped cottonthorn
Tetradymia axillaris A. Nels.
  longspine horsebrush
Tetradymia canescens DC.
  spineless horsebrush
Tetradymia stenolepis Greene
  Mojave cottonthorn
Tetraneuris acaulis (Pursh) Greene
  stemless hymenoxys
Tetraneuris argentea (Gray) Greene
  perkysue
Tetraneuris brandegei (Porter ex Gray) Parker
  Brandegee's hymenoxys
Tetraneuris ivesiana Greene
  Ives' fournerved daisy
Thelesperma gracile (Torr.) Gray
  = Thelesperma megapotamicum
Thelesperma longipes Gray
  longstalk greenthread
Thelesperma megapotamicum (Spreng.) Kuntze
  cota, navajo tea
Thelesperma simplicifolium Gray
  slender greenthread
Thelesperma subnudum Gray
  sand fringedpod
Thymophylla acerosa (DC.) Strother
  pricklyleaf dogweed
Thymophylla concinna (Gray) Strother
  Sonoran pricklyleaf
Thymophylla pentachaeta (DC.) Small
  fiveneedle pricklyleaf
Tithonia thurberi Gray
  Arizona sunflowerweed
Townsendia annua Beaman
  annual townsend daisy
Townsendia exscapa (Richards.) Porter
  stemless townsendia
Townsendia formosa Greene
  smooth townsend daisy
Townsendia incana Nutt.
  hoary townsendia
Townsendia smithii L. Shultz & A. Holmgren
  Black Rock townsend daisy
Townsendia strigosa Nutt.
  hairy townsendia
Tragopogon dubius Scop.
  yellow salsify
Tragopogon mirabilis Rouy
  Ontario goatsbeard
Tragopogon mirus Ownbey
  remarkable goatsbeard
Tragopogon miscellus Ownbey
  Moscow salsify
Tragopogon porrifolius L.
  salsify
Tragopogon pratensis L.
  meadow salsify
Trichoptilium incisum (Gray) Gray
  yellowdome
Trixis californica Kellogg
  California trixis
Uropappus linearifolius Nutt.
Vanclevea stylosa (Eastw.) Greene
  pillar false gumweed
Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray
  golden crownbeard
Verbesina longifolia (Gray) Gray
  longleaf crownbeard
Verbesina rothrockii Robins. & Greenm.
  Rothrock's crownbeard
Vernonia marginata (Torr.) Raf.
  plains ironweed
Viguiera annua (M.E. Jones) Blake
  = Heliomeris longifolia var. annua
Viguiera ciliata (Robins. & Greenm.) Blake
  = Heliomeris ciliata
Viguiera cordifolia Gray
  heartleaf goldeneye
Viguiera deltoidea var. parishii (Greene) Vasey & Rose
  = Viguiera parishii
Viguiera dentata (Cav.) Spreng.
  toothleaf goldeneye
Viguiera longifolia (Robins. & Greenm.) Blake
  = Heliomeris longifolia var. longifolia
Viguiera multiflora (Nutt.) Blake
  = Heliomeris multiflora var. multiflora
Viguiera ovalis Blake
  = Heliomeris multiflora var. brevifolia
Viguiera parishii Greene
  Parish's goldeneye
Viguiera triloba (Gray) J. Olsen
  yellow streamers
Wyethia arizonica Gray
  Arizona mulesears
Wyethia scabra Hook.
  badlands wyethia
Xanthisma texanum DC.
  Texas sleepydaisy
Xanthium spinosum L.
  spiny cockleburr
Xanthium strumarium L.
  rough cockleburr, cadillos
Xanthocephalum gymnospermoides (Gray) Benth. & Hook. f.
  San Pedro matchweed
Xanthocephalum wrightii (Gray) Gray
  = Gutierrezia wrightii
Xylorhiza tortifolia (Torr. & Gray) Greene
  Mojave aster
Zaluzania grayana Robins. & Greenm.
  = Viguiera triloba
Zexmenia podocephala (Gray) Gray
  = Lasianthaea podocephala
Zinnia acerosa (DC.) Gray
  desert zinnia
Zinnia grandiflora Nutt.
  Rocky Mountain zinnia
Zinnia peruviana (L.) L.
  Peruvian zinnia

CONVOLVULACEAE
Calystegia longipes (S. Wats.) Brummitt
  Paiute false bindweed
Calystegia macounii (Greene) Brummitt
  Macoun's false bindweed
Calystegia sepium (L.) R. Br.
  hedge false bindweed
Convolvulus arvensis L.
  field bindweed
Convolvulus equitans Benth.
  Texas bindweed
Convolvulus linearilobus Eastw.
  = Calystegia longipes
Cressa truxillensis Kunth
  spreading alkaliweed
Cuscuta applanata Engelm.
  Gila River dodder
Cuscuta californica Hook. & Arn.
  chaparral dodder
Cuscuta cephalanthi Engelm.
  buttonbush dodder
Cuscuta coryli Engelm.
  hazel dodder
Cuscuta dentatasquamata Yuncker
  los pinitos dodder
Cuscuta denticulata Engelm.
  desert dodder
Cuscuta erosa Yuncker
  Sonoran dodder
Cuscuta gronovii Willd. ex J.A. Schultes
  scaldweed
Cuscuta indecora Choisy
  bigseed alfalfa dodder
Cuscuta mitriformis Engelm.
  Cochise dodder
Cuscuta odontolepis Engelm.
  Santa Rita Mountain dodder
Cuscuta pentagona Engelm.
  fiveangled dodder
Cuscuta potosina Schaffn.
  globe dodder
Cuscuta salina Engelm.
  saltmarsh dodder
Cuscuta tuberculata Brandeg.
  tubercle dodder
Cuscuta umbellata Kunth
  flatglobe dodder
Cuscuta warneri Yuncker
  = Cuscuta indecora var. warneri
Dichondra argentea Humb. & Bonpl. ex Willd.
  silver ponysfoot
Dichondra brachypoda Woot. & Standl.
  New Mexico ponysfoot
Dichondra repens var. sericea (Sw.) Choisy
  = Dichondra sericea
Dichondra sericea Sw.
  silverleaf ponysfoot
Evolvulus alsinoides (L.) L.
  slender dwarf morningglory
Evolvulus arizonicus Gray
  wild dwarf morningglory
Evolvulus nuttallianus J.A. Schultes
  shaggy dwarf morningglory
Evolvulus pilosus Nutt.
  = Evolvulus nuttallianus
Evolvulus sericeus Sw.
  silver dwarf morningglory
Ipomoea X leucantha Jacq. (pro sp.)
  morningglory
Ipomoea barbatisepala Gray
  canyon morningglory
Ipomoea capillacea (Kunth) G. Don
  purple morningglory
Ipomoea cardiophylla Gray
  heartleaf morningglory
Ipomoea costellata Torr.
  crestrib morningglory
Ipomoea cristulata Hallier f.
  Transpecos morningglory
Ipomoea hederacea Jacq.
  ivyleaf morningglory
Ipomoea heterophylla Ortega
  = Ipomoea pubescens
Ipomoea hirsutula Jacq. f.
  = Ipomoea purpurea
Ipomoea lemmonii Gray
  = Ipomoea tenuiloba
Ipomoea leptotoma Torr.
  = Ipomoea ternifolia var. leptotoma
Ipomoea lindheimeri Gray
  Lindheimer's morningglory
Ipomoea longifolia Benth.
  pinkthroat morningglory
Ipomoea muricata Cav., non (L.) Jacq.
  = Ipomoea capillacea
Ipomoea plummerae Gray
  Huachuca Mountain morningglory
Ipomoea pubescens Lam.
  morningglory
Ipomoea purpurea (L.) Roth
  tall morningglory
Ipomoea tenuiloba Torr.
  spiderleaf
Ipomoea ternifolia Cav.
Ipomoea thurberi Gray
  Thurber's morningglory
Jacquemontia agrestis (Mart. ex Choisy) Meisn.
  midnightblue clustervine
Jacquemontia palmeri S. Wats.
  = Jacquemontia agrestis
Jacquemontia pringlei Gray
  Pringle's clustervine

CORNACEAE
Cornus sericea L.
  redosier dogwood
Cornus sericea ssp. sericea L.
  redosier dogwood
Cornus stolonifera Michx.
  = Cornus sericea ssp. sericea

CRASSULACEAE
Crassula connata (Ruiz & Pavon) Berger
  sand pygmyweed
Crassula drummondii (Torr. & Gray) Fedde
  smallleaf pygmyweed
Crassula saginoides (Maxim.) Bywater & Wickens
  wrinkleseed pygmyweed
Dudleya collomiae Rose ex Morton
  Gila County liveforever
Dudleya pulverulenta (Nutt.) Britt. & Rose
  chalk liveforever
Echeveria rusbyi (Greene) A. Nels. & J.F. Macbr.
  = Graptopetalum rusbyi
Graptopetalum bartramii Rose
  Patagonia Mountain leatherpetal
Graptopetalum rusbyi (Greene) Rose
  San Francisco River leatherpetal
Sedum cockerellii Britt.
  Cockerell's stonecrop
Sedum lanceolatum Torr.
  spearleaf stonecrop
Sedum rhodanthum Gray
  redpod stonecrop
Sedum stelliforme S. Wats.
  Huachuca Mountain stonecrop
Tillaea 
  = Crassula 

CROSSOSOMATACEAE
Apacheria chiricahuensis C.T. Mason
  apachebush
Crossosoma bigelovii S. Wats.
  ragged rockflower
Crossosoma parviflorum B.L. Robins. & Fern.
  smallflower rockflower
Glossopetalon spinescens Gray
  spiny greasebush

CRUCIFERAE
Arabis drummondii Gray
  Drummond's rockcress
Arabis fendleri (S. Wats.) Greene
  Fendler's rockcress
Arabis glabra (L.) Bernh.
  tower rockcress
Arabis gracilipes Greene
  Flagstaff rockcress
Arabis hirsuta (L.) Scop.
  hairy rockcress
Arabis lignifera A. Nels.
  desert rockcress
Arabis pendulina Greene
  rabbitear rockcress
Arabis perennans S. Wats.
  perennial rockcress
Arabis pulchra M.E. Jones ex S. Wats.
  beauty rockcress
Arabis tricornuta Rollins
  Rincon Mountain rockcress
Athysanus pusillus (Hook.) Greene
  common sandweed
Barbarea orthoceras Ledeb.
  American yellowrocket
Brassica alba Rabenh., non L.
  = Sinapis alba
Brassica arvensis (L.) Rabenh.
  = Sinapis arvensis
Brassica campestris L.
  = Brassica rapa var. rapa
Brassica hirta Moench
  = Sinapis alba
Brassica juncea (L.) Czern.
  India mustard
Brassica kaber (DC.) L.C. Wheeler
  = Sinapis arvensis
Brassica nigra (L.) W.D.J. Koch
  black mustard
Brassica rapa L.
  rape mustard
Brassica tournefortii Gouan
  Asian mustard
Camelina microcarpa DC.
  littlepod falseflax
Camelina sativa (L.) Crantz
  gold-of-pleasure
Capsella bursa-pastoris (L.) Medik.
  shepherd's purse
Cardamine cordifolia Gray
  heartleaf bittercress
Cardamine parviflora L.
  sand bittercress
Cardaria draba (L.) Desv.
  pepperweed whitetop
Cardaria pubescens (C.A. Mey.) Jarmolenko
  hairy whitetop
Caulanthus cooperi (S. Wats.) Payson
  Cooper's wild cabbage
Caulanthus crassicaulis (Torr.) S. Wats.
  thickstem wild cabbage
Chorispora tenella (Pallas) DC.
  crossflower
Conringia orientalis (L.) Dumort.
  hare's ear mustard
Coronopus didymus (L.) Sm.
  lesser swinecress
Descurainia californica (Gray) O.E. Schulz
  Sierran tansymustard
Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn
  mountain tansymustard
Descurainia obtusa (Greene) O.E. Schulz
  blunt tansymustard
Descurainia pinnata (Walt.) Britt.
  western tansymustard
Descurainia richardsonii ssp. incisa (Engelm.) Detling
  = Descurainia incana ssp. incisa
Descurainia sophia (L.) Webb ex Prantl
  herb sophia
Dimorphocarpa pinnatifida Rollins
  tansy spectaclepod
Dimorphocarpa wislizeni (Engelm.) Rollins
  touristplant
Diplotaxis muralis (L.) DC.
  annual wallrocket
Diplotaxis tenuifolia (L.) DC.
  perennial wallrocket
Dithyrea californica Harvey
  California shieldpod
Dithyrea wislizeni Engelm.
  = Dimorphocarpa wislizeni
Draba asprella Greene
  rough whitlowgrass
Draba aurea Vahl ex Hornem.
  golden whitlowgrass
Draba brachycarpa Nutt. ex Torr. & Gray
  shortpod whitlowgrass
Draba crassifolia Graham
  snowbed whitlowgrass
Draba cuneifolia Nutt. ex Torr. & Gray
  wedgeleaf whitlowgrass
Draba helleriana Greene
  Heller's whitlowgrass
Draba petrophila Greene
  Santa Rita Mountain whitlowgrass
Draba platycarpa Torr. & Gray
  broadpod whitlowgrass
Draba rectifructa C.L. Hitchc.
  mountain whitlowgrass
Draba reptans (Lam.) Fern.
  Carolina whitlowgrass
Draba spectabilis Greene
  showy whitlowgrass
Draba standleyi J.F. Macbr. & Payson
  Standley's whitlowgrass
Dryopetalon runcinatum Gray
  rockmustard
Eruca sativa P. Mill.
  = Eruca vesicaria ssp. sativa
Eruca vesicaria (L.) Cav.
  rocketsalad
Erysimum capitatum (Dougl. ex Hook.) Greene
  sanddune wallflower
Erysimum inconspicuum (S. Wats.) MacM.
  shy wallflower
Erysimum repandum L.
  spreading wallflower
Erysimum wheeleri Rothrock
  = Erysimum capitatum var. capitatum
Guillenia lasiophylla (Hook. & Arn.) Greene
Guillenia lemmonii (S. Wats.) R. Buck
Halimolobos diffusa (Gray) O.E. Schulz
  spreading fissurewort
Hutchinsia procumbens (L.) Desv.
  prostrate hutchinsia
Lepidium alyssoides Gray
  mesa pepperwort
Lepidium bourgeauanum Thellung
  Bourgeau's pepperweed
Lepidium campestre (L.) Ait. f.
  field pepperweed
Lepidium densiflorum Schrad.
  common pepperweed
Lepidium fremontii S. Wats.
  desert pepperweed
Lepidium integrifolium Nutt.
  thickleaf pepperweed
Lepidium lasiocarpum Nutt.
  shaggyfruit pepperweed
Lepidium medium Greene
  = Lepidium virginicum var. medium
Lepidium montanum Nutt.
  mountain pepperweed
Lepidium oblongum Small
  veiny pepperweed
Lepidium perfoliatum L.
  clasping pepperweed
Lepidium thurberi Woot.
  Thurber's pepperweed
Lepidium virginicum L.
  Virginia pepperweed
Lesquerella arizonica S. Wats.
  Arizona bladderpod
Lesquerella cinerea S. Wats.
  basin bladderpod
Lesquerella fendleri (Gray) S. Wats.
  Fendler's bladderpod
Lesquerella gooddingii Rollins & Shaw
  Goodding's bladderpod
Lesquerella gordonii (Gray) S. Wats.
  Gordon's bladderpod
Lesquerella intermedia (S. Wats.) Heller
  mid bladderpod
Lesquerella kaibabensis Rollins
  Kaibab bladderpod
Lesquerella ludoviciana (Nutt.) S. Wats.
  foothill bladderpod
Lesquerella pinetorum Woot. & Standl.
  White Mountain bladderpod
Lesquerella purpurea (Gray) S. Wats.
  rose bladderpod
Lesquerella rectipes Woot. & Standl.
  straight bladderpod
Lesquerella sessilis (S. Wats.) Small
  sessile bladderpod
Lesquerella tenella A. Nels.
  Moapa bladderpod
Lesquerella wardii S. Wats.
  Ward's bladderpod
Lobularia maritima (L.) Desv.
  seaside lobularia
Lyrocarpa coulteri Hook. & Harvey ex Harvey
  Coulter's lyrepod
Malcolmia africana (L.) Ait. f.
  African mustard
Matthiola longipetala (Vent.) DC.
  night scented stock
Nasturtium nasturtium-aquaticum (L.) Karsten
  = Rorippa nasturtium-aquaticum
Pennellia longifolia (Benth.) Rollins
  longleaf mock thelypody
Pennellia micrantha (Gray) Nieuwl.
  mountain mock thelypody
Physaria chambersii Rollins
  Chambers' twinpod
Physaria newberryi Gray
  Newberry's twinpod
Raphanus raphanistrum L.
  wild radish
Raphanus sativus L.
  wild radish
Rorippa curvipes Greene
  bluntleaf yellowcress
Rorippa curvisiliqua (Hook.) Bess. ex Britt.
  curvepod yellowcress
Rorippa islandica 
  = Rorippa palustris 
Rorippa microtitis (B.L. Robins.) Rollins
  Chihuahuan yellowcress
Rorippa nasturtium-aquaticum (L.) Hayek
  watercress
Rorippa obtusa (Nutt.) Britt.
  = Rorippa teres
Rorippa palustris (L.) Bess.
  bog yellowcress
Rorippa sinuata (Nutt.) A.S. Hitchc.
  spreading yellowcress
Rorippa sphaerocarpa (Gray) Britt.
  roundfruit yellowcress
Rorippa sylvestris (L.) Bess.
  creeping yellowcress
Rorippa teres (Michx.) R. Stuckey
  southern marsh yellowcress
Schoenocrambe linearifolia (Gray) Rollins
  slimleaf plainsmustard
Sinapis alba L.
  white mustard
Sinapis arvensis L.
  charlock mustard
Sinapis nigra L.
  = Brassica nigra
Sisymbrium altissimum L.
  tall tumblemustard
Sisymbrium ambiguum (S. Wats.) Payson
  = Thelypodiopsis ambigua var. ambigua
Sisymbrium irio L.
  Londonrocket
Sisymbrium kearneyi Rollins
  = Thelypodiopsis purpusii
Sisymbrium linearifolium (Gray) Payson
  = Schoenocrambe linearifolia
Sisymbrium orientale L.
  Indian hedgemustard
Stanleya albescens M.E. Jones
  white princesplume
Stanleya elata M.E. Jones
  Panamint princesplume
Stanleya pinnata (Pursh) Britt.
  desert princesplume
Streptanthus arizonicus S. Wats.
  = Streptanthus carinatus ssp. arizonicus
Streptanthella longirostris (S. Wats.) Rydb.
  longbeak streptanthella
Streptanthus carinatus C. Wright ex Gray
  lyreleaf jewelflower
Streptanthus cordatus Nutt.
  heartleaf twistflower
Streptanthus lemmonii (S. Wats.) Jepson
  = Guillenia lemmonii
Thelypodiopsis ambigua (S. Wats.) Al-Shehbaz
  Long Valley tumblemustard
Thelypodiopsis elegans (M.E. Jones) Rydb.
  Westwater tumblemustard
Thelypodiopsis linearifolia (Gray) Al-Shehbaz
  = Schoenocrambe linearifolia
Thelypodiopsis purpusii (Brandeg.) Rollins
  Purpus' tumblemustard
Thelypodium integrifolium (Nutt.) Endl. ex Walp.
  entireleaved thelypody
Thelypodium lasiophyllum (Hook. & Arn.) Greene
  = Guillenia lasiophylla
Thelypodium laxiflorum Al-Shehbaz
  droopflower thelypody
Thelypodium wrightii Gray
  Wright's thelypody
Thlaspi arvense L.
  field pennycress
Thlaspi montanum var. fendleri (Gray) P. Holmgren
  Fendler's pennycress
Thlaspi montanum var. montanum L.
  alpine pennycress
Thysanocarpus curvipes Hook.
  sand fringepod
Thysanocarpus laciniatus Nutt.
  Santa Cruz Island fringepod

CUCURBITACEAE
Apodanthera undulata Gray
  melon loco
Brandegea bigelovii (S. Wats.) Cogn.
  desert starvine
Cucurbita californica Torr. ex S. Wats.
  = Cucurbita palmata
Cucurbita digitata Gray
  fingerleaf gourd
Cucurbita foetidissima Kunth
  buffalo gourd
Cucurbita palmata S. Wats.
  coyote gourd
Cyclanthera dissecta (Torr. & Gray) Arn.
  cutleaf cyclanthera
Echinocystis lobata (Michx.) Torr. & Gray
  wild cucumber
Echinopepon wrightii (Gray) S. Wats.
  wild balsam apple
Ibervillea tenuisecta (Gray) Small
  slimlobe globeberry
Marah gilensis Greene
  Gila manroot
Sicyos ampelophyllus Woot. & Standl.
  streamside burr cucumber
Sicyos angulatus L.
  oneseed burr cucumber
Sicyos laciniatus L.
  cutleaf burr cucumber
Sicyosperma gracile Gray
  climbing arrowheads
Tumamoca macdougalii Rose
  Tumamoc globeberry

CUPRESSACEAE
Cupressus arizonica Greene
  Arizona cypress
Cupressus glabra Sudworth
  Arizona smooth cypress
Juniperus californica Carr.
  California juniper
Juniperus communis L.
  common juniper
Juniperus communis var. depressa Pursh
  common juniper
Juniperus communis var. montana Ait.
  common juniper
Juniperus deppeana Steud.
  alligator juniper
Juniperus erythrocarpa Cory
  redberry juniper
Juniperus monosperma (Engelm.) Sarg.
  oneseed juniper
Juniperus osteosperma (Torr.) Little
  Utah juniper
Juniperus scopulorum Sarg.
  Rocky Mountain juniper
Juniperus sibirica Burgsd.
  = Juniperus communis var. montana

DENNSTAEDTIACEAE (Polypodiaceae)
Pteridium aquilinum (L.) Kuhn
  western brackenfern
Pteridium aquilinum var. pubescens Underwood
  hairy brackenfern

DRYOPTERIDACEAE (Polypodiaceae)
Athyrium filix-femina (L.) Roth
  common ladyfern
Athyrium filix-femina ssp. cyclosorum (Rupr.) C. Christens.
  subarctic ladyfern
Cystopteris bulbifera (L.) Bernh.
  bulblet bladderfern
Cystopteris fragilis (L.) Bernh.
  brittle bladderfern
Cystopteris reevesiana Lellinger
  Reeves' bladderfern
Cystopteris tenuis (Michx.) Desv.
  upland brittle bladderfern
Cystopteris utahensis Windham & Haufler
  Utah bladderfern
Dryopteris arguta (Kaulfuss) Watt
  coastal woodfern
Dryopteris filix-mas (L.) Schott
  male fern
Dryopteris patula var. rossii (C. Christens.) C. Christens.
  = Dryopteris rossii
Dryopteris rossii C. Christens.
  Ross' woodfern
Gymnocarpium dryopteris (L.) Newman
  western oakfern
Phanerophlebia auriculata Underwood
  eared veinfern
Polystichum lonchitis (L.) Roth
  northern hollyfern
Polystichum scopulinum (D.C. Eat.) Maxon
  mountain hollyfern
Woodsia neomexicana Windham
  New Mexico cliff fern
Woodsia oregana D.C. Eat.
  Oregon woodsia
Woodsia phillipsii Windham
  Phillips' cliff fern
Woodsia plummerae Lemmon
  Plummer's cliff fern
Woodsia scopulina D.C. Eat.
  Rocky Mountain woodsia

ELAEAGNACEAE
Elaeagnus angustifolia L.
  Russian olive
Shepherdia argentea (Pursh) Nutt.
  silver buffaloberry
Shepherdia canadensis (L.) Nutt.
  russet buffaloberry
Shepherdia rotundifolia Parry
  roundleaf buffaloberry

ELATINACEAE
Elatine americana (Pursh) Arn.
  American waterwort
Elatine brachysperma Gray
  shortseed waterwort
Elatine californica Gray
  California waterwort
Elatine chilensis Gray
  Chilean waterwort
Elatine rubella Rydb.
  southwestern waterwort

EPHEDRACEAE
Ephedra X arenicola Cutler
  sandy jointfir
Ephedra aspera Engelm. ex S. Wats.
  rough mormon tea
Ephedra californica S. Wats.
  California jointfir
Ephedra californica var. californica S. Wats.
  California jointfir
Ephedra cutleri Peebles
Ephedra fasciculata A. Nels.
  Arizona jointfir
Ephedra fasciculata var. fasciculata A. Nels.
  Arizona jointfir
Ephedra funerea Coville & Morton
  death valley ephedra
Ephedra nevadensis S. Wats.
  Nevada jointfir
Ephedra nevadensis var. nevadensis S. Wats.
  Nevada jointfir
Ephedra torreyana S. Wats.
  popotillo
Ephedra trifurca Torr. ex S. Wats.
  desert ephedra
Ephedra viridis Coville
  mormon tea
Ephedra viridis var. viridis Coville
  mormon tea

EQUISETACEAE
Equisetum X ferrissii Clute (pro sp.)
  Ferriss' horsetail
Equisetum arvense L.
  field horsetail
Equisetum hyemale L.
  scouringrush horsetail
Equisetum hyemale var. affine (Engelm.) A.A. Eat.
  scouringrush horsetail
Equisetum laevigatum A. Braun
  smooth horsetail

ERICACEAE
Arbutus arizonica (Gray) Sarg.
  Arizona madrone
Arctostaphylos patula Greene
  greenleaf manzanita
Arctostaphylos pringlei Parry
  Pringle manzanita
Arctostaphylos pungens Kunth
  pointleaf manzanita
Arctostaphylos uva-ursi (L.) Spreng.
  kinnikinnick
Chimaphila maculata (L.) Pursh
  striped prince's pine
Chimaphila umbellata (L.) W. Bart.
  pipsissewa
Chimaphila umbellata ssp. acuta (Rydb.) Hulten
  pipsissewa
Moneses uniflora (L.) Gray
  single delight
Orthilia secunda (L.) House
  sidebells wintergreen
Phyllodoce empetriformis (Sm.) D. Don
  pink mountainheath
Pyrola chlorantha Sw.
  greenflowered wintergreen
Pyrola elliptica Nutt.
  waxflower shinleaf
Pyrola picta Sm.
  whiteveined wintergreen
Pyrola secunda L.
  = Orthilia secunda
Vaccinium geminiflorum Kunth
  Mexican blueberry
Vaccinium myrtillus L.
  whortleberry
Vaccinium myrtillus var. oreophilum (Rydb.) Dorn
  whortleberry
Vaccinium oreophilum Rydb.
  = Vaccinium myrtillus var. oreophilum
Vaccinium ovatum Pursh
  evergreen huckleberry
Vaccinium ovatum var. ovatum Pursh
  evergreen huckleberry

EUPHORBIACEAE
Acalypha californica Benth.
  California copperleaf
Acalypha indica L.
  Indian copperleaf
Acalypha lindheimeri Muell.-Arg.
  yerba del cancer
Acalypha neomexicana Muell.-Arg.
  New Mexico copperleaf
Acalypha ostryifolia Riddell
  pineland threeseed mercury
Acalypha pringlei S. Wats.
  = Acalypha californica
Argythamnia adenophora Gray
  glandular silverbush
Argythamnia brandegei Millsp.
  Sonoran silverbush
Argythamnia cyanophylla (Woot. & Standl.) Ingram
  Charleston Mountain silverbush
Argythamnia lanceolata (Benth.) Muell.-Arg.
  narrowleaf silverbush
Argythamnia mercurialina (Nutt.) Muell.-Arg.
  tall silverbush
Argythamnia neomexicana Muell.-Arg.
  New Mexico silverbush
Argythamnia serrata (Torr.) Muell.-Arg.
  Yuma silverbush
Bernardia incana Morton
  = Bernardia myricifolia
Bernardia myricifolia (Scheele) S. Wats.
  mouse's eye
Chamaesyce abramsiana (L.C. Wheeler) Koutnik
  Abrams' sandmat
Chamaesyce albomarginata (Torr. & Gray) Small
  whitemargin sandmat
Chamaesyce arizonica (Engelm.) Arthur
  Arizona sandmat
Chamaesyce capitellata (Engelm.) Millsp.
  head sandmat
Chamaesyce chaetocalyx (Boiss.) Woot. & Standl.
Chamaesyce dioica (Kunth) Millsp.
  royal sandmat
Chamaesyce fendleri (Torr. & Gray) Small
  Fendler's sandmat
Chamaesyce fendleri var. fendleri (Torr. & Gray) Small
  Fendler's sandmat
Chamaesyce florida (Engelm.) Millsp.
  Chiricahua Mountain sandmat
Chamaesyce glyptosperma (Engelm.) Small
  ribseed sandmat
Chamaesyce gracillima (S. Wats.) Millsp.
  Mexican sandmat
Chamaesyce hirta (L.) Millsp.
  pillpod sandmat
Chamaesyce hypericifolia (L.) Millsp.
  graceful sandmat
Chamaesyce hyssopifolia (L.) Small
  hyssopleaf sandmat
Chamaesyce maculata (L.) Small
  spotted sandmat
Chamaesyce melanadenia (Torr.) Millsp.
  squaw sandmat
Chamaesyce micromera (Boiss.) Woot. & Standl.
  Sonoran sandmat
Chamaesyce ocellata (Dur. & Hilg.) Millsp.
  Contura Creek sandmat
Chamaesyce parryi (Engelm.) Rydb.
  Parry's sandmat
Chamaesyce pediculifera (Engelm.) Rose & Standl.
  Carrizo Mountain sandmat
Chamaesyce platysperma (Engelm. ex S. Wats.) Shinners
  flatseed sandmat
Chamaesyce polycarpa (Benth.) Millsp. ex Parish
  smallseed sandmat
Chamaesyce prostrata (Ait.) Small
  prostrate sandmat
Chamaesyce revoluta (Engelm.) Small
  threadstem sandmat
Chamaesyce serpens (Kunth) Small
  matted sandmat
Chamaesyce serpyllifolia (Pers.) Small
  thymeleaf sandmat
Chamaesyce serrula (Engelm.) Woot. & Standl.
  sawtooth sandmat
Chamaesyce setiloba (Engelm. ex Torr.) Millsp. ex Parish
  Yuma sandmat
Chamaesyce stictospora (Engelm.) Small
  slimseed sandmat
Chamaesyce trachysperma (Engelm.) Millsp.
  San Pedro River sandmat
Chamaesyce vermiculata (Raf.) House
  wormseed sandmat
Cnidoscolus angustidens Torr.
  mala mujer
Croton californicus Muell.-Arg.
  California croton
Croton ciliatoglandulifer Ortega
  Mexican croton
Croton corymbulosus Engelm.
  = Croton pottsii var. pottsii
Croton fruticulosus Engelm. ex Torr.
  bush croton
Croton lindheimerianus Scheele
  threeseed croton
Croton longipes M.E. Jones
  = Croton californicus var. longipes
Croton monanthogynus Michx.
  prairie tea
Croton pottsii (Klotzsch) Muell.-Arg.
  leatherweed
Croton setigerus Hook.
  turkey mullein
Croton sonorae Torr.
  Sonoran croton
Croton texensis (Klotzsch) Muell.-Arg.
  Texas croton
Croton wigginsii L.C. Wheeler
  Wiggins' croton
Ditaxis 
  = Argythamnia 
Eremocarpus setigerus (Hook.) Benth.
  = Croton setigerus
Euphorbia aaron-rossii A.& N. Holmgren
  Marble Canyon spurge
Euphorbia abramsiana L.C. Wheeler
  = Chamaesyce abramsiana
Euphorbia albomarginata Torr. & Gray
  = Chamaesyce albomarginata
Euphorbia alta J.B.S. Norton
  giant spurge
Euphorbia arizonica Engelm.
  = Chamaesyce arizonica
Euphorbia bilobata Engelm.
  blackseed spurge
Euphorbia brachycera Engelm.
  horned spurge
Euphorbia capitellata Engelm.
  = Chamaesyce capitellata
Euphorbia chamaesula Boiss.
  mountain spurge
Euphorbia crenulata Engelm.
  Chinese caps
Euphorbia cyathophora Murr.
  fire on the mountain
Euphorbia dentata Michx.
  toothed spurge
Euphorbia eriantha Benth.
  beetle spurge
Euphorbia esula L.
  wolf's milk
Euphorbia exstipulata Engelm.
  squareseed spurge
Euphorbia fendleri Torr. & Gray
  = Chamaesyce fendleri
Euphorbia florida Engelm.
  = Chamaesyce florida
Euphorbia glyptosperma Engelm.
  = Chamaesyce glyptosperma
Euphorbia gracillima S. Wats.
  = Chamaesyce gracillima
Euphorbia heterophylla L.
  Mexican fireplant
Euphorbia hirta L.
  = Chamaesyce hirta
Euphorbia hyssopifolia L.
  = Chamaesyce hyssopifolia
Euphorbia incisa Engelm.
  Mojave spurge
Euphorbia indivisa (Engelm.) Tidestrom
  = Chamaesyce dioica
Euphorbia lathyris L.
  moleplant
Euphorbia lurida Engelm.
  San Francisco Mountain spurge
Euphorbia macropus (Klotzsch & Garcke) Boiss.
  Huachuca Mountain spurge
Euphorbia marginata Pursh
  snow on the mountain
Euphorbia melanadenia Torr.
  = Chamaesyce melanadenia
Euphorbia micromera Boiss.
  = Chamaesyce micromera
Euphorbia odontadenia Boiss.
  Segi Canyon spurge
Euphorbia palmeri Engelm.
  woodland spurge
Euphorbia parryi Engelm.
  = Chamaesyce parryi
Euphorbia pediculifera Engelm.
  = Chamaesyce pediculifera
Euphorbia peplus L.
  petty spurge
Euphorbia pilulifera auct. non L.
  = Chamaesyce hirta
Euphorbia platysperma Engelm. ex S. Wats.
  = Chamaesyce platysperma
Euphorbia plummerae S. Wats.
  = Euphorbia macropus
Euphorbia polycarpa Benth.
  = Chamaesyce polycarpa var. polycarpa
Euphorbia prostrata Ait.
  = Chamaesyce prostrata
Euphorbia radians Benth.
  sun spurge
Euphorbia revoluta Engelm.
  = Chamaesyce revoluta
Euphorbia robusta (Engelm.) Small
  Rocky Mountain spurge
Euphorbia serpens Kunth
  = Chamaesyce serpens
Euphorbia serpyllifolia Pers.
  = Chamaesyce serpyllifolia ssp. serpyllifolia
Euphorbia spathulata Lam.
  warty spurge
Euphorbia stictospora Engelm.
  = Chamaesyce stictospora
Euphorbia supina Raf.
  = Chamaesyce maculata
Euphorbia trachysperma Engelm.
  = Chamaesyce trachysperma
Euphorbia vermiculata Raf.
  = Chamaesyce vermiculata
Jatropha cardiophylla (Torr.) Muell.-Arg.
  sangre de cristo
Jatropha cinerea (Ortega) Muell.-Arg.
  Arizona nettlespurge
Jatropha cuneata Wiggins & Rollins
  sangre de drago
Jatropha macrorhiza Benth.
  ragged nettlespurge
Jatropha macrorhiza var. septemfida Engelm.
  ragged nettlespurge
Manihot angustiloba (Torr.) Muell.-Arg.
  desertmountain manihot
Manihot davisiae Croizat
  Arizona manihot
Phyllanthus polygonoides Nutt. ex Spreng.
  smartweed leafflower
Reverchonia arenaria Gray
  sand reverchonia
Ricinus communis L.
  castorbean
Sapium biloculare (S. Wats.) Pax
  Mexican jumpingbean
Stillingia linearifolia S. Wats.
  queensroot
Stillingia paucidentata S. Wats.
  Mojave toothleaf
Stillingia spinulosa Torr.
  annual toothleaf
Tetracoccus fasciculatus (S. Wats.) Croizat
  purplebush
Tetracoccus hallii Brandeg.
Tragia amblyodonta (Muell.-Arg.) Pax & K. Hoffmann
  dogtooth noseburn
Tragia laciniata (Torr.) Muell.-Arg.
  Sonoita noseburn
Tragia nepetifolia Cav.
  catnip noseburn
Tragia ramosa Torr.
  branched noseburn

FAGACEAE
Quercus X organensis Trel.
  oak
Quercus X pauciloba Rydb. (pro sp.)
  wavyleaf oak
Quercus arizonica Sarg.
  Arizona white oak
Quercus chrysolepis Liebm.
  canyon live oak
Quercus dunnii Kellogg
  Palmer oak
Quercus emoryi Torr.
  Emory's oak
Quercus fendleri Liebm.
  = Quercus X pauciloba
Quercus gambelii Nutt.
  Gambel's oak
Quercus grisea Liebm.
  gray oak
Quercus hypoleucoides A. Camus
  silverleaf oak
Quercus oblongifolia Torr.
  Mexican blue oak
Quercus pungens Liebm.
  pungent oak
Quercus rugosa Nee
  netleaf oak
Quercus toumeyi Sarg.
  Toumey's oak
Quercus turbinella Greene
  shrub live oak

FOUQUIERIACEAE
Fouquieria splendens Engelm.
  ocotillo

FUMARIACEAE
Corydalis aurea Willd.
  golden smoke
Fumaria occidentalis Pugsley
  western fumitory
Fumaria parviflora Lam.
  fineleaf fumitory

GARRYACEAE
Garrya flavescens S. Wats.
  ashy silktassel
Garrya wrightii Torr.
  Wright's silktassel

GENTIANACEAE
Centaurium calycosum (Buckl.) Fern.
  Arizona centaury
Centaurium nudicaule (Engelm.) B.L. Robins.
  Santa Catalina Mountain centaury
Eustoma exaltatum (L.) Salisb. ex G. Don
  catchfly prairiegentian
Frasera albomarginata S. Wats.
  desert elkweed
Frasera paniculata Torr.
  tufted elkweed
Frasera speciosa Dougl. ex Griseb.
  showy frasera
Gentiana affinis Griseb.
  pleated gentian
Gentiana bigelovii Gray
  = Gentiana affinis
Gentiana calycosa Griseb.
  Rainier pleated gentian
Gentiana forwoodii Gray
  = Gentiana affinis
Gentiana fremontii Torr.
  moss gentian
Gentiana parryi Engelm.
  Parry's gentian
Gentiana thermalis Kuntze
  = Gentianopsis thermalis
Gentiana wrightii Gray
  = Gentianella amarella ssp. wrightii
Gentianella amarella (L.) Boerner
  autumn dwarfgentian
Gentianella barbellata (Engelm.) J. Gillett
  = Gentianopsis barbellata
Gentianella detonsa ssp. elegans (A. Nels.) J. Gillett
  = Gentianopsis thermalis
Gentianella microcalyx (J.G. Lemmon) J. Gillett
  Chiricahua dwarfgentian
Gentianella tenella (Rottb.) Boerner
  Dane's dwarfgentian
Gentianella wislizeni (Engelm.) J. Gillett
  Chiricahua Mountain dwarfgentian
Gentianopsis barbellata (Engelm.) Iltis
  perennial fringedgentian
Gentianopsis macrantha (D. Don ex G. Don) Iltis
  grand fringedgentian
Gentianopsis thermalis (Kuntze) Iltis
  Rocky Mountain fringedgentian
Halenia recurva (Sm.) Allen
  Mt. Graham spurredgentian
Swertia albomarginata (S. Wats.) Kuntze
  = Frasera albomarginata var. albomarginata
Swertia perennis L.
  star gentian
Swertia radiata (Kellogg) Kuntze
  = Frasera speciosa

GERANIACEAE
Erodium cicutarium (L.) L'Her. ex Ait.
  redstem stork's bill
Erodium moschatum (L.) L'Her. ex Ait.
  musky stork's bill
Erodium texanum Gray
  Texas stork's bill
Geranium caespitosum James
  pineywoods geranium
Geranium carolinianum L.
  Carolina geranium
Geranium lentum Woot. & Standl.
  Mogollon geranium
Geranium richardsonii Fisch. & Trautv.
  Richardson's geranium
Geranium wislizeni S. Wats.
  Huachuca Mountain geranium

GROSSULARIACEAE (Saxifragaceae)
Ribes aureum Pursh
  golden currant
Ribes cereum Dougl.
  wax currant
Ribes cereum var. pedicellare Brewer & S. Wats.
  whisky currant
Ribes inerme Rydb.
  whitestem gooseberry
Ribes leptanthum Gray
  trumpet gooseberry
Ribes montigenum McClatchie
  gooseberry currant
Ribes pinetorum Greene
  orange gooseberry
Ribes quercetorum Greene
  rock gooseberry
Ribes velutinum Greene
  desert gooseberry
Ribes viscosissimum Pursh
  sticky currant
Ribes wolfii Rothrock
  Wolf's currant

HALORAGACEAE
Myriophyllum aquaticum (Vell.) Verdc.
  parrot feather watermilfoil
Myriophyllum quitense Kunth
  Andean watermilfoil
Myriophyllum sibiricum Komarov
  shortspike watermilfoil
Myriophyllum spicatum L.
  spike watermilfoil

HIPPURIDACEAE
Hippuris vulgaris L.
  common marestail

HYDRANGEACEAE (Saxifragaceae)
Fendlera rupicola Gray
  cliff fendlerbush
Fendlera wrightii (Gray) Heller
  Wright's fendlerbush
Fendlerella utahensis (S. Wats.) Heller
  Utah fendlerbush
Jamesia americana Torr. & Gray
  cliffbush
Philadelphus argenteus Rydb.
  silver mockorange
Philadelphus argyrocalyx Woot.
  silvercup mockorange
Philadelphus crinitus (C.L. Hitchc.) Hu
  TransPecos mockorange
Philadelphus maculatus (C.L. Hitchc.) Hu
  spotted mockorange
Philadelphus madrensis Hemsl.
  desert mountain mockorange
Philadelphus microphyllus Gray
  littleleaf mockorange
Philadelphus occidentalis A. Nels.
  western mockorange
Philadelphus palmeri Rydb.
  Palmer's mockorange
Philadelphus serpyllifolius Gray
  littleleaf mockorange

HYDROCHARITACEAE
Egeria densa Planch.
  Brazilian waterweed
Elodea bifoliata St. John
  twoleaf waterweed
Elodea canadensis Michx.
  Canadian waterweed
Hydrilla verticillata (L. f.) Royle
  waterthyme
Vallisneria americana Michx.
  American eelgrass

HYDROPHYLLACEAE
Emmenanthe penduliflora Benth.
  yellow whisperingbells
Eriodictyon angustifolium Nutt.
  narrowleaf yerbasanta
Eucrypta chrysanthemifolia (Benth.) Greene
  spotted hideseed
Eucrypta micrantha (Torr.) Heller
  dainty desert hideseed
Hesperochiron pumilus (Dougl. ex Griseb.) Porter
  dwarf hesperochiron
Hydrophyllum occidentale (S. Wats.) Gray
  western waterleaf
Nama arizonicum Bacon
  Arizona fiddleleaf
Nama demissum Gray
  leafy nama
Nama dichotomum (Ruiz & Pavon) Choisy
  wishbone fiddleleaf
Nama hispidum Gray
  bristly nama
Nama pusillum J.G. & S.A. Lemmon ex Gray
  eggleaf fiddleleaf
Nama retrorsum J.T. Howell
  betatakin fiddleleaf
Nama rothrockii Gray
  Rothrock's fiddleleaf
Nama stenocarpum Gray
  mud fiddleleaf
Phacelia affinis Gray
  limestone scorpionweed
Phacelia alba Rydb.
  white scorpionweed
Phacelia arizonica Gray
  Arizona scorpionweed
Phacelia bombycina Woot. & Standl.
  Mangas Spring scorpionweed
Phacelia cephalotes Gray
  virgin scorpionweed
Phacelia coerulea Greene
  skyblue scorpionweed
Phacelia constancei Atwood
  Constance's scorpionweed
Phacelia crenulata Torr. ex S. Wats.
  cleftleaf wildheliotrope
Phacelia cryptantha Greene
  hiddenflower scorpionweed
Phacelia curvipes Torr. ex S. Wats.
  Washoe scorpionweed
Phacelia demissa Gray
  Intermountain scorpionweed
Phacelia distans Benth.
  distant phacelia
Phacelia egena (Greene ex Brand) Greene ex J.T. Howell
  Kaweah River scorpionweed
Phacelia filiformis Brand
  narrow scorpionweed
Phacelia fremontii Torr.
  Fremont's phacelia
Phacelia glechomifolia Gray
  pennyroyal leaf scorpionweed
Phacelia heterophylla Pursh
  varileaf phacelia
Phacelia howelliana Atwood
  harlequin scorpionweed
Phacelia integrifolia Torr.
  gypsum scorpionweed
Phacelia ivesiana Torr.
  Ives' phacelia
Phacelia laxiflora J.T. Howell
  dozing scorpionweed
Phacelia lemmonii Gray
  Lemmon's scorpionweed
Phacelia neglecta M.E. Jones
  alkali scorpionweed
Phacelia neomexicana Thurb. ex Torr.
  New Mexico scorpionweed
Phacelia palmeri Torr. ex S. Wats.
  Palmer's scorpionweed
Phacelia parryi Torr.
  Parry's scorpionweed
Phacelia pedicellata Gray
  pedicellate scorpionweed
Phacelia pulchella Gray
  beautiful scorpionweed
Phacelia rafaelensis Atwood
  plateau scorpionweed
Phacelia ramosissima Dougl. ex Lehm.
  branching phacelia
Phacelia rotundifolia Torr. ex S. Wats.
  roundleaf scorpionweed
Phacelia rupestris Greene
  rock scorpionweed
Phacelia saxicola Gray
  stonecrop scorpionweed
Phacelia scopulina (A. Nels.) J.T. Howell
  Debeque phacelia
Phacelia sericea (Graham) Gray
  silky phacelia
Phacelia serrata J. Voss
  saw scorpionweed
Phacelia tanacetifolia Benth.
  lacy scorpionweed
Phacelia vallis-mortae J. Voss
  Death Valley scorpionweed
Phacelia welshii Atwood
  Welsh's phacelia
Pholistoma auritum (Lindl.) Lilja
  blue fiestaflower
Tricardia watsonii Torr. ex S. Wats.
  threehearts

IRIDACEAE
Iris missouriensis Nutt.
  Rocky Mountain iris
Nemastylis tenuis (Herbert) Benth.
  southwestern pleatleaf
Sisyrinchium arizonicum Rothrock
  Arizona blueeyed grass
Sisyrinchium cernuum (Bickn.) Kearney
  nodding blueeyed grass
Sisyrinchium demissum Greene
  dwarf blueeyed grass
Sisyrinchium elmeri Greene
  Elmer's blueeyed grass
Sisyrinchium longipes (Bickn.) Kearney & Peebles
  timberland blueeyed grass
Sisyrinchium macrocarpon Bickn.
  Willow Spring blueeyed grass

ISOETACEAE
Isoetes bolanderi Engelm.
  Bolander's quillwort
Isoetes bolanderi var. pygmaea (Engelm.) Clute
  pygmy quillwort

JUGLANDACEAE
Juglans major (Torr.) Heller
  Arizona walnut
Juglans microcarpa var. major (Torr.) L. Benson
  = Juglans major

KRAMERIACEAE
Krameria erecta Willd. ex J.A. Schultes
  littleleaf ratany
Krameria grayi Rose & Painter
  white ratany
Krameria lanceolata Torr.
  trailing krameria
Krameria parvifolia Benth.
  = Krameria erecta
Krameria secundiflora auct. non DC.
  = Krameria lanceolata

LABIATAE
Agastache barberi (B.L. Robins.) Epling
  = Agastache pallida
Agastache breviflora (Gray) Epling
  TransPecos giant hyssop
Agastache micrantha (Gray) Woot. & Standl.
  white giant hyssop
Agastache pallida (Lindl.) Cory
  pale giant hyssop
Agastache pallidiflora (Heller) Rydb.
  Bill Williams' Mountain giant hyssop
Agastache rupestris (Greene) Standl.
  threadleaf giant hyssop
Agastache wrightii (Greenm.) Woot. & Standl.
  Sonoran giant hyssop
Clinopodium vulgare L.
  wild basil
Dracocephalum parviflorum Nutt.
  American dragonhead
Hedeoma costata Gray
  falsepennyroyal
Hedeoma dentata Torr.
  dentate falsepennyroyal
Hedeoma diffusa Greene
  spreading falsepennyroyal
Hedeoma drummondii Benth.
  Drummond's falsepennyroyal
Hedeoma hyssopifolia Gray
  falsepennyroyal
Hedeoma nana (Torr.) Briq.
  falsepennyroyal
Hedeoma oblongifolia (Gray) Heller
  falsepennyroyal
Hyptis emoryi Torr.
  desert lavender
Lamium amplexicaule L.
  henbit deadnettle
Leonurus cardiaca L.
  common motherwort
Lycopus americanus Muhl. ex W. Bart.
  American waterhorehound
Lycopus asper Greene
  rough bugleweed
Lycopus lucidus auct. p.p. non Turcz. ex Benth.
  = Lycopus asper
Marrubium vulgare L.
  horehound
Mentha X rotundifolia (L.) Huds. (pro sp.)
  mint
Mentha arvensis L.
  wild mint
Mentha canadensis L. (?)
  Canadian mint
Mentha spicata L.
  spearmint
Mentha viridis L.
  = Mentha spicata
Moldavica parviflora (Nutt.) Britt.
  = Dracocephalum parviflorum
Moluccella laevis L.
  shellflower
Monarda austromontana Epling
  = Monarda citriodora ssp. austromontana
Monarda citriodora Cerv. ex Lag.
  lemon beebalm
Monarda citriodora ssp. austromontana (Epling) Scora
  lemon beebalm
Monarda fistulosa L.
  wildbergamot beebalm
Monarda fistulosa ssp. fistulosa L.
  wildbergamot beebalm
Monarda fistulosa ssp. fistulosa var. menthifolia (Graham) Fern.
  wild oregano
Monarda menthifolia Graham
  = Monarda fistulosa ssp. fistulosa var. menthifolia
Monarda pectinata Nutt.
  oregano del campo
Monardella arizonica Epling
  Arizona mountainbalm
Monardella glauca Greene
Monardella lanceolata Gray
  mustang mountainbalm
Monardella linoides Gray
  narrowleaf monardella
Monardella odoratissima Benth.
  Pacific monardella
Nepeta cataria L.
  catnip
Physostegia correllii (Lundell) Shinners
  Correll's false dragonhead
Poliomintha incana (Torr.) Gray
  hoary rosemarymint
Prunella vulgaris L.
  common selfheal
Salazaria mexicana Torr.
  Mexican bladdersage
Salvia aethiopis L.
  Mediterranean sage
Salvia amissa Epling
  Santa Catalina Mountain sage
Salvia arizonica Gray
  desert indigo sage
Salvia columbariae Benth.
  chia
Salvia davidsonii Greenm.
  Davidson's sage
Salvia dorrii (Kellogg) Abrams
  grayball sage
Salvia dorrii ssp. mearnsii (Britt.) McClintock
  Mearns' sage
Salvia henryi Gray
  crimson sage
Salvia lemmonii Gray
  Lemmon's sage
Salvia mohavensis Greene
  Mojave sage
Salvia pachyphylla Epling ex Munz
  blue sage
Salvia parryi Gray
  Parry's sage
Salvia pinguifolia (Fern.) Woot. & Standl.
  rock sage
Salvia reflexa Hornem.
  chan
Salvia subincisa Benth.
  sawtooth sage
Salvia tiliifolia Vahl
  lindenleaf sage
Scutellaria epilobiifolia A. Hamilton
  = Scutellaria galericulata
Scutellaria galericulata L.
  marsh skullcap
Scutellaria lateriflora L.
  mad dog skullcap
Scutellaria potosina Brandeg.
  Mexican skullcap
Scutellaria potosina ssp. potosina var. tessellata 
  Arizona skullcap
Scutellaria resinosa Torr.
  = Scutellaria wrightii
Scutellaria tessellata Epling
  = Scutellaria potosina ssp. potosina var. tessellata
Scutellaria wrightii Gray
  plains skullcap
Stachys agraria auct. non Cham. & Schlecht.
  = Stachys crenata
Stachys coccinea Ortega
  scarlet hedgenettle
Stachys crenata Raf.
  mousesear
Stachys palustris L.
  marsh hedgenettle
Stachys palustris ssp. pilosa (Nutt.) Epling
  marsh hedgenettle
Stachys rigida Nutt. ex Benth.
  = Stachys palustris ssp. pilosa
Stachys rothrockii Gray
  Rothrock's hedgenettle
Teucrium canadense L.
  Canada germander
Teucrium cubense Jacq.
  small coastal germander
Teucrium glandulosum Kellogg
  common germander
Trichostema arizonicum Gray
  Arizona bluecurls
Trichostema brachiatum L.
  fluxweed
Trichostema micranthum Gray
  smallflower bluecurls

LEGUMINOSAE
Acacia angustissima (P. Mill.) Kuntze
  fern acacia
Acacia constricta Benth.
  whitethorn acacia
Acacia farnesiana (L.) Willd.
  huisache
Acacia greggii Gray
  catclaw acacia
Acacia millefolia S. Wats.
  milfoil wattle
Acacia minuta (M.E. Jones) Beauchamp
  coastal scrub wattle
Acacia neovernicosa Isely
  viscid acacia
Acacia redolens Maslin
  acacia
Aeschynomene villosa Poir.
  hairy jointvetch
Albizia julibrissin Durz.
  silktree
Alhagi camelorum Fisch.
  = Alhagi maurorum
Alhagi maurorum Medik.
  camelthorn
Amorpha californica Nutt.
  mock locust
Amorpha fruticosa L.
  desert indigobush
Astragalus acutirostris S. Wats.
  sharpkeel milkvetch
Astragalus albulus Woot. & Standl.
  cibola milkvetch
Astragalus allochrous Gray
  halfmoon milkvetch
Astragalus amphioxys Gray
  Crescent milkvetch
Astragalus ampullarius S. Wats.
  gumbo milkvetch
Astragalus argophyllus Nutt.
  silverleaf milkvetch
Astragalus aridus Gray
  annual desert milkvetch
Astragalus arizonicus Gray
  Arizona milkvetch
Astragalus atwoodii Welsh & Thorne
  = Astragalus pinonis var. atwoodii
Astragalus beathii C.L. Porter
  Beath's milkvetch
Astragalus bisulcatus (Hook.) Gray
  twogrooved milkvetch
Astragalus brandegei Porter
  Brandegee's milkvetch
Astragalus bryantii Barneby
  = Astragalus lentiginosus var. palans
Astragalus calycosus Torr. ex S. Wats.
  matted poison milkvetch
Astragalus castaneiformis S. Wats.
  chestnut milkvetch
Astragalus ceramicus Sheldon
  painted milkvetch
Astragalus chuskanus Barneby & Spellenberg
  San Juan milkvetch
Astragalus cobrensis Gray
  copper mine milkvetch
Astragalus coccineus Brandeg.
  scarlet milkvetch
Astragalus coltonii M.E. Jones
  Colton's milkvetch
Astragalus crassicarpus Nutt.
  groundplum milkvetch
Astragalus cremnophylax Barneby
  sentry milkvetch
Astragalus crotalariae (Benth.) Gray
  Salton milkvetch
Astragalus desperatus M.E. Jones
  rimrock milkvetch
Astragalus didymocarpus Hook. & Arn.
  dwarf white milkvetch
Astragalus egglestonii (Rydb.) Kearney & Peebles
  Eggleston's milkvetch
Astragalus emoryanus (Rydb.) Cory
  Emory's milkvetch
Astragalus endopterus (Barneby) Barneby
  sandbar milkvetch
Astragalus ensiformis M.E. Jones
  pagumpa milkvetch
Astragalus episcopus S. Wats.
  bishop's milkvetch
Astragalus eremiticus Sheldon
  hermit milkvetch
Astragalus eurylobus (Barneby) Barneby
  Needle Mountain milkvetch
Astragalus flavus Nutt.
  yellow milkvetch
Astragalus flexuosus (Hook.) Dougl. ex G. Don
  flexile milkvetch
Astragalus fucatus Barneby
  Hopi milkvetch
Astragalus geyeri Gray
  Geyer's milkvetch
Astragalus gilensis Greene
  Gila milkvetch
Astragalus hallii Gray
  Hall's milkvetch
Astragalus hartwegii Benth.
  Hartweg's milkvetch
Astragalus holmgreniorum Barneby
  Paradox milkvetch
Astragalus humistratus Gray
  groundcover milkvetch
Astragalus hypoxylus S. Wats.
  Huachuca Mountain milkvetch
Astragalus insularis Kellogg
  Cedros milkvetch
Astragalus kentrophyta Gray
  spiny milkvetch
Astragalus layneae Greene
  widow's milkvetch
Astragalus lentiginosus Dougl. ex Hook.
  specklepod milkvetch
Astragalus lonchocarpus Torr.
  rushy milkvetch
Astragalus miser Dougl.
  weedy milkvetch
Astragalus moencoppensis M.E. Jones
  Moenkopi milkvetch
Astragalus mokiacensis Gray
  Mokiak milkvetch
Astragalus mollissimus Torr.
  woolly milkvetch
Astragalus monumentalis Barneby
  Monument Valley milkvetch
Astragalus musiniensis M.E. Jones
  Ferron's milkvetch
Astragalus newberryi Gray
  Newberry's milkvetch
Astragalus nothoxys Gray
  sheep milkvetch
Astragalus nutriosensis Sanderson
  Apache milkvetch
Astragalus nuttallianus DC.
  smallflowered milkvetch
Astragalus oocalycis M.E. Jones
  Arboles milkvetch
Astragalus oophorus S. Wats.
  egg milkvetch
Astragalus palmeri Gray
  Palmer's milkvetch
Astragalus pattersonii Gray
  Patterson's milkvetch
Astragalus pinonis M.E. Jones
  pinyon milkvetch
Astragalus praelongus Sheldon
  stinking milkvetch
Astragalus preussii Gray
  Preuss' milkvetch
Astragalus recurvus Greene
  recurved milkvetch
Astragalus rusbyi Greene
  Rusby's milkvetch
Astragalus sabulonum Gray
  gravel milkvetch
Astragalus scopulorum Porter
  Rocky Mountain milkvetch
Astragalus sesquiflorus S. Wats.
  sandstone milkvetch
Astragalus sophoroides M.E. Jones
  painted desert milkvetch
Astragalus straturensis M.E. Jones
  Pine Valley milkvetch
Astragalus striatiflorus M.E. Jones
  escarpment milkvetch
Astragalus subcinereus Gray
  Silver's milkvetch
Astragalus tephrodes Gray
  ashen milkvetch
Astragalus tetrapterus Gray
  fourwing milkvetch
Astragalus thurberi Gray
  Thurber's milkvetch
Astragalus titanophilus Barneby
  limestone milkvetch
Astragalus troglodytus S. Wats.
  creeping milkvetch
Astragalus vaccarum Gray
  Cow Spring milkvetch
Astragalus wingatanus S. Wats.
  Fort Wingate milkvetch
Astragalus xiphoides (Barneby) Barneby
  gladiator milkvetch
Astragalus zionis M.E. Jones
  Zion milkvetch
Caesalpinia drepanocarpa (Gray) Fisher
  sicklepod holdback
Caesalpinia gilliesii (Hook.) Wallich ex D. Dietr.
  bird-of-paradise shrub
Caesalpinia jamesii (Torr. & Gray) Fisher
  James' holdback
Caesalpinia virgata Fisher
  wand holdback
Calliandra eriophylla Benth.
  fairyduster
Calliandra humilis Benth.
  dwarf stickpea
Calliandra schottii Torr. ex S. Wats.
  Schott's stickpea
Canavalia ensiformis (L.) DC.
  wonderbean
Cassia bauhinioides Gray
  = Senna bauhinioides
Cassia covesii Gray
  = Senna covesii
Cassia leptocarpa var. glaberrima M.E. Jones
  = Senna hirsuta var. glaberrima
Cassia lindheimeriana Scheele
  = Senna lindheimeriana
Cassia wislizeni Gray
  = Senna wislizeni
Cassia wrightii Gray
  = Chamaecrista serpens var. wrightii
Cercis canadensis L.
  eastern redbud
Cercis orbiculata Greene
Chamaecrista absus (L.) Irwin & Barneby
  tropical sensitive pea
Chamaecrista nictitans (L.) Moench
  partridge pea
Chamaecrista serpens (L.) Greene
  slender sensitive pea
Clitoria mariana L.
  Atlantic pigeonwings
Cologania angustifolia Kunth
  longleaf cologania
Cologania lemmonii Gray
  Lemmon's cologania
Coronilla varia L.
  purple crownvetch
Coursetia caribaea (Jacq.) Lavin
  anil falso
Coursetia glabella (Gray) Lavin
  smooth babybonnets
Coursetia glandulosa Gray
  rosary babybonnets
Crotalaria pumila Ortega
  low rattlebox
Crotalaria sagittalis L.
  arrowhead rattlebox
Dalea albiflora Gray
  whiteflower prairieclover
Dalea aurea Nutt. ex Pursh
  golden prairieclover
Dalea brachystachya Gray
  Fort Bowie prairieclover
Dalea candida Willd.
  slender white prairieclover
Dalea exigua Barneby
  Chihuahuan prairieclover
Dalea exserta (Rydb.) Gentry
  Mexican prairieclover
Dalea filiformis Gray
  Sonoran prairieclover
Dalea flavescens (S. Wats.) Welsh
  Canyonlands prairieclover
Dalea formosa Torr.
  featherplume
Dalea grayi (Vail) L.O. Williams
  Gray's prairieclover
Dalea greggii Gray
  Gregg's prairieclover
Dalea jamesii (Torr.) Torr. & Gray
  James' prairieclover
Dalea lachnostachys Gray
  glandleaf prairieclover
Dalea lanata Spreng.
  woolly prairieclover
Dalea leporina (Ait.) Bullock
  foxtail prairieclover
Dalea lumholtzii B.L. Robins. & Fern.
  Lumholtz's prairieclover
Dalea mollis Benth.
  hairy prairieclover
Dalea mollissima (Rydb.) Munz
  soft prairieclover
Dalea nana Torr. ex Gray
  dwarf prairieclover
Dalea neomexicana (Gray) Cory
  downy prairieclover
Dalea pogonathera Gray
  bearded prairieclover
Dalea polygonoides Gray
  sixweeks prairieclover
Dalea pringlei Gray
  Pringle's prairieclover
Dalea pulchra H.C. Gentry
  Santa Catalina prairieclover
Dalea purpurea Vent.
  purple prairieclover
Dalea searlsiae (Gray) Barneby
  Searls' prairieclover
Dalea tentaculoides H.C. Gentry
  Gentry's indigobush
Dalea urceolata Greene
  pineforest prairieclover
Dalea versicolor Zucc.
  oakwoods prairieclover
Dalea wrightii Gray
  Wright's prairieclover
Desmanthus cooleyi (Eat.) Trel.
  Cooley's bundleflower
Desmanthus covillei (Britt. & Rose) Wiggins ex B.L. Turner
  Coville's bundleflower
Desmanthus glandulosus (B.L. Turner) Luckow
  glandular bundleflower
Desmodium arizonicum S. Wats.
  Arizona ticktrefoil
Desmodium batocaulon Gray
  San Pedro ticktrefoil
Desmodium cinerascens Gray
  spiked ticktrefoil
Desmodium grahamii Gray
  Graham's ticktrefoil
Desmodium gramineum Gray
  grassleaf ticktrefoil
Desmodium intortum (P. Mill.) Urban
  greenleaf ticktrefoil
Desmodium metcalfei (Rose & Painter) Kearney & Peebles
  Metcalfe's ticktrefoil
Desmodium neomexicanum Gray
  New Mexico ticktrefoil
Desmodium procumbens (P. Mill.) A.S. Hitchc.
  western trailing ticktrefoil
Desmodium psilocarpum Gray
  Santa Cruz Island ticktrefoil
Desmodium psilophyllum Schlecht.
  simpleleaf ticktrefoil
Desmodium retinens Schlecht.
  Santa Rita Mountain ticktrefoil
Desmodium rosei Schub.
  Rose's ticktrefoil
Desmodium scopulorum S. Wats.
  Sonoran ticktrefoil
Desmodium tortuosum (Sw.) DC.
  dixie ticktrefoil
Diphysa thurberi (Gray) Rydb.
  Thurber's diphysa
Errazurizia rotundata (Woot.) Barneby
  roundleaf dunebroom
Erythrina flabelliformis Kearney
  coralbean
Eysenhardtia orthocarpa (Gray) S. Wats.
  Tahitian kidneywood
Eysenhardtia polystachya (Ortega) Sarg.
  kidneywood
Galactia wrightii Gray
  Wright's milkpea
Glycyrrhiza lepidota Pursh
  American licorice
Hedysarum boreale Nutt.
  northern sweetvetch
Hoffmannseggia glauca (Ortega) Eifert
  Indian rushpea
Indigofera sphaerocarpa Gray
  Sonoran indigo
Lathyrus brachycalyx Rydb.
  Bonneville peavine
Lathyrus eucosmus Butters & St. John
  bush vetchling
Lathyrus graminifolius (S. Wats.) White
  grassleaf peavine
Lathyrus laetivirens Greene ex Rydb.
  aspen peavine
Lathyrus lanszwertii Kellogg
  thickleaf peavine
Lathyrus latifolius L.
  perennial peavine
Lathyrus pauciflorus Fern.
  fewflower peavine
Leucaena leucocephala (Lam.) de Wit
  white leadtree
Lotus alamosanus (Rose) Gentry
  Sonoran birdsfoot trefoil
Lotus corniculatus L.
  birdfoot deervetch
Lotus greenei Ottley ex Kearney & Peebles
  Greene's birdsfoot trefoil
Lotus hamatus Greene
  San Diego birdsfoot trefoil
Lotus humistratus Greene
  foothill deervetch
Lotus mearnsii (Britt.) Greene
  Mearns' birdsfoot trefoil
Lotus oblongifolius (Benth.) Greene
  streambank birdsfoot trefoil
Lotus plebeius (Brand) Barneby
  New Mexico birdsfoot trefoil
Lotus rigidus (Benth.) Greene
  shrubby deervetch
Lotus salsuginosus Greene
  coastal birdsfoot trefoil
Lotus strigosus (Nutt.) Greene
  Bishop lotus
Lotus unifoliolatus (Hook.) Benth.
  American birdsfoot trefoil
Lotus utahensis Ottley
  Utah birdsfoot trefoil
Lotus wrightii (Gray) Greene
  Wright's deervetch
Lupinus X alpestris A. Nels. (pro sp.)
  lupine
Lupinus ammophilus Greene
  sand lupine
Lupinus argenteus Pursh
  silvery lupine
Lupinus aridus Dougl.
  desert lupine
Lupinus arizonicus (S. Wats.) S. Wats.
  Arizona lupine
Lupinus barbiger S. Wats.
  bearded lupine
Lupinus bicolor Lindl.
  bicolor lupine
Lupinus brevicaulis S. Wats.
  shortstem lupine
Lupinus caudatus Kellogg
  tailcup lupine
Lupinus chihuahuensis S. Wats.
  Chihuahuan lupine
Lupinus concinnus J.G. Agardh
  scarlet lupine
Lupinus hillii Greene
  Hill's lupine
Lupinus kingii S. Wats.
  King's lupine
Lupinus latifolius Lindl. ex J.G. Agardh
  broadleaf lupine
Lupinus lemmonii C.P. Sm.
  Lemmon's lupine
Lupinus neomexicanus Greene
  New Mexico lupine
Lupinus odoratus Heller
  Mojave royal lupine
Lupinus palmeri S. Wats.
  bluebonnet lupine
Lupinus pusillus Pursh
  rusty lupine
Lupinus sericeus Pursh
  silky lupine
Lupinus shockleyi S. Wats.
  purple desert lupine
Lupinus sparsiflorus Benth.
  Mojave lupine
Lupinus succulentus Dougl. ex K. Koch
  hollowleaf annual lupine
Lupinus volutans Greene
  pinyon lupine
Lysiloma watsonii Rose
  littleleaf false tamarind
Macroptilium atropurpureum (Moc. & Sesse ex DC.) Urban
  purple bushbean
Macroptilium gibbosifolium (Ortega) A. Delgado
  variableleaf bushbean
Marina calycosa (Gray) Barneby
  San Pedro false prairieclover
Marina diffusa (Moric.) Barneby
  spreading false prairieclover
Marina parryi (Torr. & Gray) Barneby
  Parry's false prairieclover
Medicago lupulina L.
  black medick
Medicago minima (L.) L.
  burr medick
Medicago polymorpha L.
  burclover
Medicago sativa L.
  alfalfa
Melilotus albus Medik.
  = Melilotus officinalis
Melilotus indicus (L.) All.
  annual yellow sweetclover
Melilotus officinalis (L.) Lam.
  yellow sweetclover
Mimosa aculeaticarpa Ortega
  mimosa
Mimosa dysocarpa Benth.
  velvetpod mimosa
Mimosa grahamii Gray
  Graham's mimosa
Mimosa laxiflora Benth.
  Arizona mimosa
Nissolia schottii (Torr.) Gray
  Schott's yellowhood
Nissolia wislizeni (Gray) Gray
  Arizona yellowhood
Olneya tesota Gray
  desert ironwood
Oxytropis lambertii Pursh
  Lambert's crazyweed
Oxytropis oreophila Gray
  roundleaf crazyweed
Paraserianthes lophantha (Willd.) I. Nielsen
  plume albizia
Parkinsonia aculeata L.
  Jerusalem thorn
Parkinsonia florida (Benth. ex Gray) S. Wats.
  blue paloverde
Parkinsonia microphylla Torr.
  yellow paloverde
Parryella filifolia Torr. & Gray ex Gray
  common dunebroom
Pediomelum aromaticum (Payson) W.A. Weber
  aromatic Indian breadroot
Pediomelum castoreum (S. Wats.) Rydb.
  beaver scurfpea
Pediomelum megalanthum (Woot. & Standl.) Rydb.
  Intermountain Indian breadroot
Pediomelum mephiticum (S. Wats.) Rydb.
  skunktop
Pediomelum pentaphyllum (L.) Rydb.
  small Indian breadroot
Petalostemon 
  = Dalea 
Peteria scoparia Gray
  rush peteria
Peteria thompsoniae S. Wats.
  Thompson's peteria
Phaseolus acutifolius Gray
  tepary bean
Phaseolus angustissimus Gray
  slimleaf bean
Phaseolus filiformis Benth.
  slimjim bean
Phaseolus grayanus Woot. & Standl.
  Gray's bean
Phaseolus maculatus Scheele
  spotted bean
Phaseolus parvulus Greene
  Pinos Altos Mountain bean
Phaseolus ritensis M.E. Jones
  Santa Rita Mountain bean
Phaseolus supinus Wiggins & Rollins
  supine bean
Poinciana gilliesii Wallich ex Hook.
  = Caesalpinia gilliesii
Prosopis glandulosa Torr.
  honey mesquite
Prosopis glandulosa var. glandulosa Torr.
  honey mesquite
Prosopis glandulosa var. torreyana (L. Benson) M.C. Johnston
  western honey mesquite
Prosopis pubescens Benth.
  screwbean mesquite
Prosopis velutina Woot.
  velvet mesquite
Psoralea 
  = Pediomelum 
Psoralidium junceum (Eastw.) Rydb.
  rush lemonweed
Psoralidium lanceolatum (Pursh) Rydb.
  lemon scurfpea
Psoralidium tenuiflorum (Pursh) Rydb.
  slimflower scurfpea
Psorothamnus arborescens (Torr. ex Gray) Barneby
  Mojave dalea
Psorothamnus emoryi (Gray) Rydb.
  dyebush
Psorothamnus fremontii (Torr. ex Gray) Barneby
  Fremont's dalea
Psorothamnus schottii (Torr.) Barneby
  Schott's dalea
Psorothamnus scoparius (Gray) Rydb.
  broom dalea
Psorothamnus spinosus (Gray) Barneby
  smoketree
Psorothamnus thompsoniae (Vail) Welsh & Atwood
  Thompson's smokebush
Rhynchosia edulis Griseb.
  Chihuahuan snoutbean
Rhynchosia senna Gillies ex Hook.
  Texas snoutbean
Robinia neomexicana Gray
  New Mexico locust
Senna armata (S. Wats.) Irwin & Barneby
  desertsenna
Senna artemisioides (Gaud. ex DC.) Randell
  senna
Senna bauhinioides (Gray) Irwin & Barneby
  twinleaf senna
Senna covesii (Gray) Irwin & Barneby
  Coves' cassia
Senna hirsuta (L.) Irwin & Barneby
  woolly wild sensitive plant
Senna hirsuta var. glaberrima (M.E. Jones) Irwin & Barneby
  woolly wild sensitive plant
Senna lindheimeriana (Scheele) Irwin & Barneby
  velvet leaf wild sensitive plant
Senna wislizeni (Gray) Irwin & Barneby
  Wislizenus' wild sensitive plant
Sesbania herbacea (P. Mill.) McVaugh
Sophora arizonica S. Wats.
  Arizona necklacepod
Sophora nuttalliana B.L. Turner
  silky sophora
Sophora stenophylla Gray
  fringeleaf necklacepod
Sphaerophysa salsula (Pallas) DC.
  alkali swainsonpea
Sphinctospermum constrictum (S. Wats.) Rose
  hourglass peaseed
Strophostyles leiosperma (Torr. & Gray) Piper
  slickseed fuzzybean
Tephrosia leiocarpa Gray
  smoothpod hoarypea
Tephrosia tenella Gray
  red hoarypea
Tephrosia thurberi (Rydb.) C.E. Wood
  Thurber's hoarypea
Thermopsis gracilis T.J. Howell
Thermopsis gracilis var. ovata (B.L. Robins. ex Piper) M. Mendenhall
Thermopsis montana var. ovata (B.L. Robins. ex Piper) St. John
  = Thermopsis gracilis var. ovata
Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards.
  prairie thermopsis
Thermopsis rhombifolia var. montana (Nutt.) Isely
  mountain thermopsis
Trifolium albopurpureum Torr. & Gray
  rancheria clover
Trifolium amabile Kunth
  Aztec clover
Trifolium andinum Nutt.
  Andes clover
Trifolium dasyphyllum Torr. & Gray
  alpine clover
Trifolium dubium Sibthorp
  suckling clover
Trifolium gracilentum Torr. & Gray
  pinpoint clover
Trifolium gymnocarpon Nutt.
  hollyleaf clover
Trifolium hybridum L.
  alsike clover
Trifolium kingii S. Wats.
  King's clover
Trifolium longipes Nutt.
  longstalk clover
Trifolium microcephalum Pursh
  smallhead clover
Trifolium mucronatum Willd. ex Spreng.
  cusp clover
Trifolium neurophyllum Greene
  White Mountain clover
Trifolium pinetorum Greene
  woods clover
Trifolium pratense L.
  red clover
Trifolium repens L.
  white clover
Trifolium variegatum Nutt.
  whitetip clover
Trifolium wormskioldii Lehm.
  cows clover
Vicia americana Muhl. ex Willd.
  American vetch
Vicia leucophaea Greene
  Mogollon Mountain vetch
Vicia ludoviciana Nutt.
  Louisiana vetch
Vicia ludoviciana ssp. ludoviciana Nutt.
  slim vetch
Vicia pulchella Kunth
  sweetclover vetch
Vicia sativa L.
  common vetch
Vicia villosa Roth
  winter vetch
Zornia gemella Vogel
  dos hoja zazabacoa de dos hojas
Zornia leptophylla (Benth.) Pittier
  horsekiller

LEMNACEAE
Lemna aequinoctialis Welw.
  lesser duckweed
Lemna gibba L.
  swollen duckweed
Lemna minima Chev. ex Schleid.
  = Lemna minor
Lemna minor L.
  common duckweed
Lemna minuta Kunth
  least duckweed
Lemna obscura (Austin) Daubs
  little duckweed
Lemna perpusilla Torr.
  minute duckweed
Lemna trisulca L.
  star duckweed
Lemna turionifera Landolt
  turion duckweed
Lemna valdiviana Phil.
  valdivia duckweed
Spirodela polyrrhiza (L.) Schleid.
  common duckweed
Spirodela punctata (G.F.W. Mey.) C.H. Thompson
  dotted duckweed

LENNOACEAE
Ammobroma sonorae Torr. ex Gray
  = Pholisma sonorae
Pholisma arenarium Nutt. ex Hook.
  sand plant
Pholisma sonorae (Torr. ex Gray) Yatskievych
  sandfood, biatatk

LENTIBULARIACEAE
Utricularia macrorhiza Le Conte
  common bladderwort
Utricularia vulgaris L. p.p.
  = Utricularia macrorhiza

LILIACEAE
Allium acuminatum Hook.
  tapertip onion
Allium atrorubens S. Wats.
  darkred onion
Allium bigelovii S. Wats.
  Bigelow's onion
Allium bisceptrum S. Wats.
  twincrest onion
Allium cernuum Roth
  nodding onion
Allium geyeri S. Wats.
  Geyer's onion
Allium geyeri var. tenerum M.E. Jones
  bulbil onion
Allium glandulosum Link & Otto
  gland onion
Allium gooddingii Ownbey
  Goodding's onion
Allium kunthii G. Don
  Kunth's onion
Allium macropetalum Rydb.
  largeflower wild onion
Allium nevadense S. Wats.
  Nevada onion
Allium palmeri S. Wats.
  = Allium bisceptrum var. palmeri
Allium parishii S. Wats.
  Parish's onion
Allium plummerae S. Wats.
  Tanners Canyon onion
Allium rhizomatum Woot. & Standl.
  = Allium glandulosum
Androstephium breviflorum S. Wats.
  pink funnellily
Anthericum torreyi Baker p.p.
  = Echeandia flavescens
Asparagus officinalis L.
  garden asparagus
Brodiaea 
  = Triteleia 
Calochortus ambiguus (M.E. Jones) Ownbey
  doubting Mariposa lily
Calochortus aureus S. Wats.
  golden Mariposa lily
Calochortus flexuosus S. Wats.
  winding Mariposa lily
Calochortus gunnisonii S. Wats.
  Gunnison's Mariposa lily
Calochortus kennedyi Porter
  desert Mariposa lily
Calochortus nuttallii Torr. & Gray
  sego lily
Dichelostemma capitatum (Benth.) Wood
  bluedicks
Disporum trachycarpum (S. Wats.) Benth. & Hook. f.
  roughfruit fairybells
Echeandia flavescens (J.A. & J.H. Schultes) Cruden
  Torrey's craglily
Eremocrinum albomarginatum (M.E. Jones) M.E. Jones
  lonely lily
Fritillaria atropurpurea Nutt.
  spotted missionbells
Hesperocallis undulata Gray
  desertlily
Hypoxis mexicana J.A. & J.H. Schultes
  Mexican yellow stargrass
Leucocrinum montanum Nutt. ex Gray
  common starlily
Lilium parryi S. Wats.
  Parry's lily
Lilium philadelphicum L.
  wood lily
Lilium umbellatum Pursh
  = Lilium philadelphicum var. andinum
Maianthemum racemosum (L.) Link
  feathery false Solomon's seal
Maianthemum racemosum ssp. amplexicaule (Nutt.) LaFrankie
  western Solomon's seal
Maianthemum stellatum (L.) Link
  starry false Solomon's seal
Milla biflora Cav.
  Mexican star
Nothoscordum texanum M.E. Jones
  Texas false garlic
Polygonatum cobrense (Woot. & Standl.) R.R. Gates
  McKittrick's Solomon's seal
Smilacina 
  = Maianthemum 
Streptopus amplexifolius (L.) DC.
  claspleaf twistedstalk
Triteleia lemmoniae (S. Wats.) Greene
  Oak Creek tripletlily
Triteleiopsis palmeri (S. Wats.) Hoover
  Palmer's Bajalily
Vagnera 
  = Maianthemum 
Veratrum californicum Dur.
  California false hellebore
Veratrum californicum var. californicum Dur.
  California false hellebore
Zephyranthes longifolia Hemsl.
  copper zephyrlily
Zigadenus elegans Pursh
  mountain deathcamas
Zigadenus paniculatus (Nutt.) S. Wats.
  foothill deathcamas
Zigadenus virescens (Kunth) J.F. Macbr.
  green deathcamas

LINACEAE
Linum aristatum Engelm.
  bristle flax
Linum australe Heller
  southern flax
Linum lewisii Pursh
  prairie flax
Linum neomexicanum Greene
  New Mexico yellow flax
Linum pratense (J.B.S. Norton) Small
  meadow flax
Linum puberulum (Engelm.) Heller
  plains flax
Linum subteres (Trel.) Winkl.
  sprucemont flax
Linum usitatissimum L.
  common flax

LOASACEAE
Cevallia sinuata Lag.
  stinging serpent
Eucnide rupestris (Baill.) H.J. Thompson & Ernst
  rock stingbush
Eucnide urens (Parry ex Gray) Parry
  desert stingbush
Mentzelia affinis Greene
  yellowcomet
Mentzelia albicaulis (Dougl. ex Hook.) Dougl. ex Torr. & Gray
  whitestem blazingstar
Mentzelia aspera L.
  tropical blazingstar
Mentzelia asperula Woot. & Standl.
  Organ Mountain blazingstar
Mentzelia cronquistii H.J. Thompson & Prigge
  Cronquist's blazingstar
Mentzelia incisa Urban & Gilg
  streambank blazingstar
Mentzelia involucrata S. Wats.
  whitebract blazingstar
Mentzelia jonesii (Urban & Gilg) H.J. Thompson & Roberts
  Jones' blazingstar
Mentzelia lindheimeri Urban & Gilg
  Lindheimer's blazingstar
Mentzelia multiflora (Nutt.) Gray
  manyflowered mentzelia
Mentzelia nitens Greene
  shining blazingstar
Mentzelia nuda (Pursh) Torr. & Gray
  bractless blazingstar
Mentzelia obscura H.J. Thompson & Roberts
  Pacific blazingstar
Mentzelia oligosperma Nutt. ex Sims
  chickenthief
Mentzelia oreophila J. Darl.
  Argus blazingstar
Mentzelia pterosperma Eastw.
  wingseed blazingstar
Mentzelia pumila Nutt. ex Torr. & Gray
  dwarf mentzelia
Mentzelia rusbyi Woot.
  Rusby's blazingstar
Mentzelia tricuspis Gray
  spinyhair blazingstar
Mentzelia veatchiana Kellogg
  whitestem blazingstar
Petalonyx linearis Greene
  narrowleaf sandpaper plant
Petalonyx nitidus S. Wats.
  shinyleaf sandpaper plant
Petalonyx parryi Gray
  Parry's sandpaper plant
Petalonyx thurberi Gray
  Thurber's sandpaper plant

LYTHRACEAE
Ammannia auriculata Willd.
  eared redstem
Ammannia coccinea Rottb.
  valley redstem
Ammannia robusta Heer & Regel
  grand redstem
Cuphea wrightii Gray
  Wright's waxweed
Lythrum californicum Torr. & Gray
  California loosestrife
Rotala ramosior (L.) Koehne
  lowland rotala

MALPIGHIACEAE
Aspicarpa hirtella L.C. Rich.
  chaparral asphead
Callaeum macropterum (DC.) D.M. Johnson
  hillyhock
Janusia gracilis Gray
  slender janusia

MALVACEAE
Abutilon berlandieri Gray ex S. Wats.
  Berlandier's Indian mallow
Abutilon incanum (Link) Sweet
  pelotazo
Abutilon mollicomum (Willd.) Sweet
  Sonoran Indian mallow
Abutilon palmeri Gray
  Palmer's Indian mallow
Abutilon parishii S. Wats.
  Parish's Indian mallow
Abutilon parvulum Gray
  dwarf Indian mallow
Abutilon reventum S. Wats.
  yellowflower Indian mallow
Abutilon theophrasti Medik.
  velvetleaf
Abutilon thurberi Gray
  Thurber's Indian mallow
Anoda abutiloides Gray
  Indian anoda
Anoda crenatiflora Ortega
  thicket anoda
Anoda cristata (L.) Schlecht.
  crested anoda
Anoda lanceolata Hook. & Arn.
  lanceleaf anoda
Anoda pentaschista Gray
  field anoda
Anoda reticulata S. Wats.
  netted anoda
Anoda thurberi Gray
  Arizona anoda
Callirhoe involucrata (Torr. & Gray) Gray
  wine cup
Eremalche exilis (Gray) Greene
  white mallow
Eremalche rotundifolia (Gray) Greene
  desert fivespot
Gossypium thurberi Todaro
  wild cotton, algodoncillo
Herissantia crispa (L.) Briz.
  bladdermallow
Hibiscus biseptus S. Wats.
  Arizona rosemallow
Hibiscus coulteri Harvey ex Gray
  desert rosemallow
Hibiscus denudatus Benth.
  paleface
Hibiscus trionum L.
  flower of an hour
Horsfordia alata (S. Wats.) Gray
  pink velvetmallow
Horsfordia newberryi (S. Wats.) Gray
  Newberry's velvetmallow
Iliamna grandiflora (Rydb.) Wiggins
  wild hollyhock
Malva neglecta Wallr.
  common mallow
Malva parviflora L.
  cheeseweed mallow
Malva rotundifolia auct. non L.
  = Malva neglecta
Malva sylvestris L.
  high mallow
Malvastrum bicuspidatum (S. Wats.) Rose
  shrubby false mallow
Malvella lepidota (Gray) Fryxell
  scurfymallow
Malvella leprosa (Ortega) Krapov.
  alkali mallow
Malvella sagittifolia (Gray) Fryxell
  arrowleaf mallow
Rhynchosida physocalyx (Gray) Fryxell
  buffpetal
Sida abutifolia P. Mill.
  spreading fanpetals
Sida hederacea (Dougl. ex Hook.) Torr. ex Gray
  = Malvella leprosa
Sida lepidota Gray
  = Malvella lepidota
Sida neomexicana Gray
  New Mexico fanpetals
Sida procumbens Sw.
  = Sida abutifolia
Sida rhombifolia L.
  cuban jute
Sida spinosa L.
  prickly fanpetals
Sida tragiifolia Gray
  earleaf fanpetals
Sidalcea neomexicana Gray
  New Mexico checkermallow
Sphaeralcea ambigua Gray
  desert globemallow
Sphaeralcea ambigua ssp. ambigua Gray
  apricot globemallow
Sphaeralcea ambigua ssp. rosacea (Munz & Johnston) Kearney
  rose globemallow
Sphaeralcea angustifolia (Cav.) G. Don
  copper globemallow
Sphaeralcea coccinea (Nutt.) Rydb.
  scarlet globemallow
Sphaeralcea coccinea ssp. coccinea (Nutt.) Rydb.
  scarlet globemallow
Sphaeralcea coccinea ssp. elata (E.G. Baker) Kearney
  scarlet globemallow
Sphaeralcea coulteri (S. Wats.) Gray
  Coulter's globemallow
Sphaeralcea digitata (Greene) Rydb.
  slippery globemallow
Sphaeralcea digitata ssp. digitata (Greene) Rydb.
  juniper globemallow
Sphaeralcea emoryi Torr. ex Gray
  Emory's globemallow
Sphaeralcea emoryi ssp. emoryi Torr. ex Gray
  Emory's globemallow
Sphaeralcea fendleri Gray
  Fendler's globemallow
Sphaeralcea fendleri ssp. albescens Kearney
  thicket globemallow
Sphaeralcea fendleri ssp. elongata Kearney
  thicket globemallow
Sphaeralcea fendleri ssp. fendleri Gray
  Fendler's globemallow
Sphaeralcea fendleri ssp. tripartita (Woot. & Standl.) Kearney
  thicket globemallow
Sphaeralcea fendleri ssp. venusta Kearney
  thicket globemallow
Sphaeralcea grossulariifolia (Hook. & Arn.) Rydb.
  gooseberryleaf globemallow
Sphaeralcea grossulariifolia ssp. grossulariifolia (Hook. & Arn.) Rydb.
  gooseberryleaf globemallow
Sphaeralcea grossulariifolia ssp. pedata (Torr. ex Gray) Kearney
  gooseberryleaf globemallow
Sphaeralcea hastulata Gray
  spear globemallow
Sphaeralcea incana Torr. ex Gray
  gray globemallow
Sphaeralcea incana ssp. cuneata Kearney
  soft globemallow
Sphaeralcea incana ssp. incana Torr. ex Gray
  gray globemallow
Sphaeralcea laxa Woot. & Standl.
  caliche globemallow
Sphaeralcea leptophylla (Gray) Rydb.
  scaly globemallow
Sphaeralcea orcuttii Rose
  Carrizo Creek globemallow
Sphaeralcea parvifolia A. Nels.
  smallflower globemallow
Sphaeralcea rusbyi Gray
  Rusby's globemallow
Sphaeralcea rusbyi ssp. gilensis Kearney
  Gila globemallow
Sphaeralcea rusbyi ssp. rusbyi Gray
  Rusby's globemallow
Sphaeralcea wrightii Gray
  Wright's globemallow
Thurberia thespesioides Gray
  = Gossypium thurberi

MARSILEACEAE
Marsilea mollis B.L. Robins. & Fern.
  Chihuahuan waterclover
Marsilea vestita Hook. & Grev.
  hairy pepperwort
Marsilea vestita ssp. vestita Hook. & Grev.
  hairy pepperwort

MELIACEAE
Melia azedarach L.
  Chinaberrytree

MENISPERMACEAE
Cocculus diversifolius DC.
  snailseed

MENYANTHACEAE
Menyanthes trifoliata L.
  buckbean
Nymphoides peltata (Gmel.) Kuntze
  yellow floatingheart

MOLLUGINACEAE
Glinus radiatus (Ruiz & Pavon) Rohrb.
  spreading sweetjuice
Mollugo cerviana (L.) Ser.
  threadstem carpetweed
Mollugo verticillata L.
  green carpetweed

MONOTROPACEAE
Hypopitys 
  = Monotropa 
Monotropa hypopithys L.
  pinesap
Pterospora andromedea Nutt.
  woodland pinedrops

MORACEAE
Morus microphylla Buckl.
  Texas mulberry

NAJADACEAE
Najas flexilis (Willd.) Rostk. & Schmidt
  nodding waternymph
Najas guadalupensis (Spreng.) Magnus
  southern waternymph
Najas marina L.
  spiny naiad

NYCTAGINACEAE
Abronia angustifolia Greene
  purple sand verbena
Abronia elliptica A. Nels.
  fragrant white sand verbena
Abronia fragrans Nutt. ex Hook.
  snowball sand verbena
Abronia nana S. Wats.
  dwarf sand verbena
Abronia villosa S. Wats.
  desert sand verbena
Acleisanthes longiflora Gray
  angel's trumpets
Allionia choisyi Standl.
  annual windmills
Allionia incarnata L.
  trailing windmills
Ammocodon chenopodioides (Gray) Standl.
  goosefoot moonpod
Anulocaulis leiosolenus (Torr.) Standl.
  southwestern ringstem
Boerhavia coccinea P. Mill.
  scarlet spiderling
Boerhavia coulteri (Hook. f.) S. Wats.
  Coulter's spiderling
Boerhavia erecta L.
  erect spiderling
Boerhavia gracillima Heimerl
  slimstalk spiderling
Boerhavia intermedia M.E. Jones
  fivewing spiderling
Boerhavia megaptera Standl.
  Tucson Mountain spiderling
Boerhavia pterocarpa S. Wats.
  Apache Pass spiderling
Boerhavia purpurascens Gray
  purple spiderling
Boerhavia scandens L.
  climbing wartclub
Boerhavia spicata Choisy
  creeping spiderling
Boerhavia triquetra S. Wats.
  slender spiderling
Boerhavia wrightii Gray
  largebract spiderling
Mirabilis albida (Walt.) Heimerl
  white four o'clock
Mirabilis bigelovii Gray
  neakstem four o'clock
Mirabilis coccinea (Torr.) Benth. & Hook. f.
  scarlet four o'clock
Mirabilis decipiens (Standl.) Standl.
  broadleaf four o'clock
Mirabilis froebelii (Behr) Greene
  = Mirabilis multiflora var. glandulosa
Mirabilis glabra (S. Wats.) Standl.
  smooth four o'clock
Mirabilis hirsuta (Pursh) MacM.
  hairy four o'clock
Mirabilis jalapa L.
  marvel of Peru
Mirabilis linearis (Pursh) Heimerl
  narrowleaf four o'clock
Mirabilis longiflora L.
  sweet four o'clock
Mirabilis multiflora (Torr.) Gray
  Colorado four o'clock, maravilla
Mirabilis multiflora var. glandulosa (Standl.) J.F. Macbr.
  Colorado four o'clock
Mirabilis multiflora var. multiflora (Torr.) Gray
  Colorado four o'clock
Mirabilis oxybaphoides (Gray) Gray
  smooth spreading four o'clock
Mirabilis pumila (Standl.) Standl.
  dwarf four o'clock
Nyctaginia capitata Choisy
  devil's bouquet
Oxybaphus 
  = Mirabilis 
Pisonia capitata (S. Wats.) Standl.
  pisonia
Selinocarpus nevadensis (Standl.) Fowler & Turner
  desert moonpod
Tripterocalyx carnea (Greene) L.A. Gal.
  winged sandpuffs
Tripterocalyx micranthus (Torr.) Hook.
  smallflower sandverbena

NYMPHAEACEAE
Nuphar lutea (L.) Sm.
  yellow pondlily
Nuphar lutea ssp. polysepala (Engelm.) E.O. Beal
  Rocky Mountain pondlily
Nuphar polysepala Engelm.
  = Nuphar lutea ssp. polysepala
Nymphaea mexicana Zucc.
  yellow waterlily
Nymphaea odorata Ait.
  American white waterlily

OLEACEAE
Forestiera neomexicana Gray
  = Forestiera pubescens var. pubescens
Forestiera pubescens Nutt.
  stretchberry
Forestiera pubescens var. pubescens Nutt.
  stretchberry
Forestiera shrevei Standl.
  desert olive
Fraxinus anomala Torr. ex S. Wats.
  singleleaf ash
Fraxinus anomala var. anomala Torr. ex S. Wats.
  singleleaf ash
Fraxinus anomala var. lowellii (Sarg.) Little
  singleleaf ash
Fraxinus cuspidata Torr.
  fragrant ash
Fraxinus dipetala Hook. & Arn.
  two petal ash
Fraxinus gooddingii Little
  Goodding's ash
Fraxinus greggii Gray
  Gregg's ash
Fraxinus papillosa Lingelsh.
  Chihuahuan ash
Fraxinus pennsylvanica ssp. velutina (Torr.) G.N. Mill.
  = Fraxinus velutina
Fraxinus velutina Torr.
  velvet ash
Menodora scabra Gray
  rough menodora
Menodora spinescens Gray
  spiny menodora

ONAGRACEAE
Anogra 
  = Oenothera 
Calylophus hartwegii (Benth.) Raven
  Hartweg's sundrops
Calylophus lavandulifolius (Torr. & Gray) Raven
  lavenderleaf sundrops
Calylophus serrulatus (Nutt.) Raven
  yellow sundrops
Calylophus toumeyi (Small) Towner
  Toumey's sundrops
Camissonia arenaria (A. Nels.) Raven
  Fortuna Range suncup
Camissonia boothii (Dougl. ex Lehm.) Raven
  Booth's eveningprimrose
Camissonia brevipes (Gray) Raven
  yellow cups
Camissonia californica (Nutt. ex Torr. & Gray) Raven
  California suncup
Camissonia cardiophylla (Torr.) Raven
  heartleaf suncup
Camissonia chamaenerioides (Gray) Raven
  longcapsule suncup
Camissonia claviformis (Torr. & Frem.) Raven
  browneyes
Camissonia confertiflora (Raven) Raven
  Grand Canyon suncup
Camissonia confusa Raven
  San Bernardino suncup
Camissonia exilis (Raven) Raven
  Cottonwood Springs suncup
Camissonia gouldii Raven
  Diamond Valley suncup
Camissonia multijuga (S. Wats.) Raven
  froststem suncup
Camissonia pallida (Abrams) Raven
  paleyellow suncup
Camissonia palmeri (S. Wats.) Raven
  Palmer eveningprimrose
Camissonia parryi (S. Wats.) Raven
  redclay suncup
Camissonia parvula (Nutt. ex Torr. & Gray) Raven
  Lewis River suncup
Camissonia pterosperma (S. Wats.) Raven
  wingfruit suncup
Camissonia refracta (S. Wats.) Raven
  narrowleaf suncup
Camissonia scapoidea (Nutt. ex Torr. & Gray) Raven
  barestem eveningprimrose
Camissonia specuicola (Raven) Raven
  Kaibab suncup
Camissonia strigulosa (Fisch. & C.A. Mey.) Raven
  sandysoil suncup
Camissonia walkeri (A. Nels.) Raven
  Walker's suncup
Chamaenerion angustifolium (L.) Scop.
  = Epilobium angustifolium ssp. angustifolium
Chamerion angustifolium (L.) Holub
  = Epilobium angustifolium ssp. angustifolium
Circaea alpina L.
  small enchanter's nightshade
Clarkia epilobioides (Nutt. ex Torr. & Gray) A. Nels. & J.F. Macbr.
  canyon fairyfan
Clarkia purpurea (W. Curtis) A. Nels. & J.F. Macbr.
  winecup fairyfan
Clarkia rhomboidea Dougl. ex Hook.
  diamond fairyfan
Epilobium angustifolium L.
  fireweed
Epilobium angustifolium ssp. angustifolium L.
  fireweed
Epilobium angustifolium ssp. circumvagum Mosquin
  fireweed
Epilobium brachycarpum K. Presl
  autumn willowweed
Epilobium canum (Greene) Raven
  hummingbird trumpet
Epilobium ciliatum Raf.
  hairy willowherb
Epilobium densiflorum (Lindl.) Hoch & Raven
Epilobium foliosum (Torr. & Gray) Suksdorf
  California willowherb
Epilobium halleanum Hausskn.
  glandular willowherb
Epilobium hornemannii Reichenb.
  Hornemann's willowherb
Epilobium lactiflorum Hausskn.
  milkflower willowweed
Epilobium minutum Lindl. ex Lehm.
  small willowweed
Epilobium oregonense Hausskn.
  slimstem willowweed
Epilobium pygmaeum (Speg.) Hoch & Raven
Epilobium saximontanum Hausskn.
  Rocky Mountain willowherb
Gaura coccinea Nutt. ex Pursh
  scarlet beeblossom
Gaura hexandra Ortega
  harlequinbush
Gaura parviflora Dougl. ex Lehm.
  velvetweed
Gayophytum decipiens Lewis & Szweykowski
  deceptive groundsmoke
Gayophytum diffusum Torr. & Gray
  spreading groundsmoke
Gayophytum racemosum Torr. & Gray
  blackfoot groundsmoke
Gayophytum ramosissimum Torr. & Gray
  pinyon groundsmoke
Ludwigia palustris (L.) Ell.
  marsh seedbox
Ludwigia peploides (Kunth) Raven
  floating primrosewillow
Ludwigia repens J.R. Forst.
  creeping primrosewillow
Oenothera abramsii J.F. Macbr.
  = Camissonia pallida ssp. pallida
Oenothera albicaulis Pursh
  whitest eveningprimrose
Oenothera arenaria (A. Nels.) Raven
  = Camissonia arenaria
Oenothera biennis var. hirsutissima Gray ex S. Wats.
  = Oenothera elata ssp. hirsutissima
Oenothera biennis var. strigosa (Rydb.) Piper
  = Oenothera villosa ssp. strigosa
Oenothera brachycarpa Gray
  shortfruit eveningprimrose
Oenothera californica (S. Wats.) S. Wats.
  California eveningprimrose
Oenothera cavernae Munz
  cavedwelling eveningprimrose
Oenothera cespitosa Nutt.
  tufted eveningprimrose
Oenothera chamaenerioides Gray
  = Camissonia chamaenerioides
Oenothera coronopifolia Torr. & Gray
  crownleaf eveningprimrose
Oenothera deltoides Torr. & Frem.
  birdcage eveningprimrose
Oenothera elata Kunth
  Hooker's eveningprimrose
Oenothera fendleri Gray
  = Calylophus hartwegii ssp. fendleri
Oenothera flava (A. Nels.) Garrett
  yellow eveningprimrose
Oenothera hartwegii Benth.
  = Calylophus hartwegii ssp. hartwegii
Oenothera havardii S. Wats.
  Havard's eveningprimrose
Oenothera hookeri 
  = Oenothera elata ssp. hirsutissima
Oenothera kunthiana (Spach) Munz
  Kunth's eveningprimrose
Oenothera leptocarpa Greene
  = Camissonia californica
Oenothera longissima Rydb.
  longstem eveningprimrose
Oenothera neomexicana (Small) Munz
  New Mexico eveningprimrose
Oenothera pallida Lindl.
  pale eveningprimrose
Oenothera pallidula (Munz) Munz
  = Camissonia brevipes ssp. pallidula
Oenothera parryi S. Wats.
  = Camissonia parryi
Oenothera platanorum Raven & Parnell
  Fort Huachuca eveningprimrose
Oenothera primiveris Gray
  desert eveningprimrose
Oenothera pubescens Willd. ex Spreng.
  South American eveningprimrose
Oenothera rosea L'Her. ex Ait.
  rose eveningprimrose
Oenothera speciosa Nutt.
  pinkladies
Oenothera villosa Thunb.
  hairy eveningprimrose
Zauschneria californica ssp. latifolia (Hook.) Keck
  = Epilobium canum ssp. latifolium
Zauschneria garrettii A. Nels.
  = Epilobium canum ssp. garrettii
Zauschneria latifolia (Hook.) Greene
  = Epilobium canum ssp. latifolium

OPHIOGLOSSACEAE
Botrychium crenulatum W.H. Wagner
  scalloped moonwort
Botrychium dissectum Spreng.
  cutleaf grapefern
Botrychium echo W.H. Wagner
  reflected grapefern
Botrychium lanceolatum (Gmel.) Angstr.
  lanceleaf grapefern
Botrychium lunaria (L.) Sw.
  common moonwort
Botrychium minganense Victorin
  Mingan moonwort
Botrychium multifidum (Gmel.) Trev.
  leathery grapefern
Botrychium pinnatum St. John
  northern moonwort
Botrychium virginianum (L.) Sw.
  rattlesnake fern
Ophioglossum engelmannii Prantl
  limestone adderstongue
Ophioglossum pusillum Raf.
  northern adderstongue

ORCHIDACEAE
Aplectrum hyemale (Muhl. ex Willd.) Torr.
  adam and eve
Calypso bulbosa (L.) Oakes
  fairyslipper orchid
Calypso bulbosa var. americana (R. Br. ex Ait. f.) Luer
  fairyslipper orchid
Coeloglossum viride (L.) Hartman
  longbract frog orchid
Corallorrhiza maculata (Raf.) Raf.
  summer coralroot
Corallorrhiza striata Lindl.
  hooded coralroot
Corallorrhiza wisteriana Conrad
  spring coralroot
Cypripedium calceolus var. pubescens (Willd.) Correll
  = Cypripedium pubescens
Cypripedium parviflorum var. pubescens (Willd.) Knight
  = Cypripedium pubescens
Cypripedium pubescens Willd.
  greater yellow lady's slipper
Epipactis gigantea Dougl. ex Hook.
  giant helleborine
Goodyera oblongifolia Raf.
  western rattlesnake plantain
Goodyera repens (L.) R. Br. ex Ait. f.
  lesser rattlesnake plantain
Habenaria 
  = Platanthera 
Habenaria viridis var. bracteata (Muhl. ex Willd.) Reichenb. ex Gray
  = Coeloglossum viride var. virescens
Hexalectris spicata (Walt.) Barnh.
  spiked crested coralroot
Hexalectris warnockii Ames & Correll
  Texas crested coralroot
Limnorchis 
  = Platanthera 
Listera convallarioides (Sw.) Nutt. ex Ell.
  broadlipped twayblade
Malaxis corymbosa (S. Wats.) Kuntze
  Huachuca Mountain addersmouth orchid
Malaxis ehrenbergii (Reichenb. f.) Kuntze
  Ehrenberg's addersmouth orchid
Malaxis macrostachya (Lex.) Kuntze
  Chiricahua addersmouth orchid
Malaxis tenuis (S. Wats.) Ames
  Arizona addersmouth orchid
Peramium 
  = Goodyera 
Platanthera hyperborea (L.) Lindl.
  northern green orchid
Platanthera leucostachys Lindl.
  bog orchid
Platanthera limosa Lindl.
  Thurber's bog orchid
Platanthera sparsiflora (S. Wats.) Schlechter
  canyon bog orchid
Platanthera stricta Lindl.
  Modoc bog orchid
Spiranthes delitescens Sheviak
  delighteful ladiestresses
Spiranthes graminea Lindl.
  Canelo ladiestresses
Spiranthes michuacana (Llave & Lex.) Hemsl.
  Michuacan ladiestresses
Spiranthes parasitica A. Rich. & Gal.
  parasitic ladiestresses
Spiranthes romanzoffiana Cham.
  hooded ladiestresses

OROBANCHACEAE
Conopholis alpina Liebm.
  alpine squawroot
Conopholis alpina var. mexicana (Gray ex S. Wats.) Haynes
  Mexican squawroot
Conopholis mexicana Gray ex S. Wats.
  = Conopholis alpina var. mexicana
Orobanche cooperi (Gray) Heller
  desert broomrape
Orobanche fasciculata Nutt.
  clustered broomrape
Orobanche ludoviciana Nutt.
  Louisiana broomrape
Orobanche ludoviciana ssp. ludoviciana Nutt.
  sand broomrape
Orobanche ludoviciana ssp. multiflora (Nutt.) Collins, comb. nov. ined.
  manyflowered broomrape
Orobanche multicaulis Brandeg.
  spiked broomrape
Orobanche uniflora L.
  oneflowered broomrape

OXALIDACEAE
Oxalis albicans Kunth
  radishroot woodsorrel
Oxalis alpina (Rose) Rose ex R. Knuth
  alpine woodsorrel
Oxalis corniculata L.
  creeping woodsorrel
Oxalis decaphylla Kunth
  tenleaf woodsorrel
Oxalis drummondii Gray
  Drummond's woodsorrel
Oxalis pes-caprae L.
  African woodsorrel
Oxalis stricta L.
  common yellow oxalis
Oxalis violacea L.
  violet woodsorrel

PAPAVERACEAE
Arctomecon californica Torr. & Frem.
  California bearpoppy
Arctomecon humilis Coville
  common bearpoppy
Argemone arizonica G.B. Ownbey
  Arizona pricklypoppy
Argemone corymbosa Greene
  Mojave pricklypoppy
Argemone gracilenta Greene
  Sonoran pricklypoppy
Argemone hispida Gray
  rough pricklypoppy
Argemone mexicana L.
  Mexican pricklypoppy
Argemone munita Dur. & Hilg.
  flatbud pricklypoppy
Argemone ochroleuca Sweet
  = Argemone mexicana
Argemone platyceras auct. non Link & Otto
  = Argemone polyanthemos
Argemone pleiacantha Greene
  southwestern pricklypoppy
Argemone polyanthemos (Fedde) G.B. Ownbey
  crested pricklypoppy
Eschscholzia californica Cham.
  California poppy
Eschscholzia californica ssp. californica Cham.
  California poppy
Eschscholzia californica ssp. mexicana (Greene) C. Clark
  California poppy
Eschscholzia mexicana Greene
  = Eschscholzia californica ssp. mexicana
Eschscholzia minutiflora S. Wats.
  pygmy goldenpoppy
Platystemon californicus Benth.
  California creamcups
Platystemon californicus var. californicus Benth.
  California creamcups

PASSIFLORACEAE
Passiflora bryonioides Kunth
  cupped passionflower
Passiflora foetida L.
  fetid passionflower
Passiflora foetida var. arizonica Killip
  Arizona passionflower
Passiflora mexicana Juss.
  Mexican passionflower

PEDALIACEAE
Martynia 
  = Proboscidea 
Proboscidea althaeifolia (Benth.) Dcne.
  devilshorn
Proboscidea parviflora (Woot.) Woot. & Standl.
  doubleclaw

PHYTOLACCACEAE
Phytolacca americana L.
  American pokeweed
Rivina humilis L.
  rougeplant

PINACEAE
Abies arizonica Merriam
  = Abies lasiocarpa var. arizonica
Abies balsamea 
  = Abies lasiocarpa 
Abies concolor (Gord. & Glend.) Lindl. ex Hildebr.
  white fir
Abies concolor var. concolor (Gord. & Glend.) Lindl. ex Hildebr.
  white fir
Abies lasiocarpa (Hook.) Nutt.
  subalpine fir
Abies lasiocarpa var. arizonica (Merriam) Lemmon
  corkbark fir
Abies lasiocarpa var. lasiocarpa (Hook.) Nutt.
  subalpine fir
Picea engelmannii Parry ex Engelm.
  Engelmann's spruce
Picea pungens Engelm.
  blue spruce
Pinus aristata Engelm.
  bristlecone pine
Pinus arizonica Engelm.
  Arizona pine
Pinus arizonica var. arizonica Engelm.
  Arizona pine
Pinus arizonica var. stormiae Martinez
  Arizona pine
Pinus ayacahuite C.A. Ehrenb.
  = Pinus strobiformis
Pinus chihuahuana Engelm.
  = Pinus leiophylla var. chihuahuana
Pinus discolor D.K. Bailey & Hawksworth
  border pinyon
Pinus edulis Engelm.
  twoneedle pinyon
Pinus edulis var. edulis Engelm.
  twoneedle pinyon
Pinus engelmannii Carr.
  Apache pine
Pinus flexilis James
  limber pine
Pinus leiophylla Schiede & Deppe
  Chihuahuan pine
Pinus leiophylla var. chihuahuana (Engelm.) Shaw
  Chihuahuan pine
Pinus monophylla Torr. & Frem.
  singleleaf pinyon
Pinus ponderosa P.& C. Lawson
  ponderosa pine
Pinus ponderosa var. scopulorum Engelm.
  ponderosa pine
Pinus strobiformis Engelm.
  southwestern white pine
Pseudotsuga menziesii (Mirbel) Franco
  Douglas fir
Pseudotsuga menziesii var. glauca (Beissn.) Franco
  Rocky Mountain Douglas fir

PLANTAGINACEAE
Plantago argyraea Morris
  saltmeadow plantain
Plantago australis Lam.
  Mexican plantain
Plantago eriopoda Torr.
  redwool plantain
Plantago heterophylla Nutt.
  slender plantain
Plantago lanceolata L.
  narrowleaf plantain
Plantago major L.
  common plantain
Plantago ovata Forsk.
  desert Indianwheat
Plantago patagonica Jacq.
  woolly plantain
Plantago rhodosperma Dcne.
  redseed plantain
Plantago tweedyi Gray
  Tweedy's plantain
Plantago virginica L.
  Virginia plantain
Plantago wrightiana Dcne.
  Wright's plantain

PLATANACEAE
Platanus wrightii S. Wats.
  Arizona sycamore

PLUMBAGINACEAE
Limonium limbatum Small
  Transpecos sealavender
Plumbago scandens L.
  doctorbush

POLEMONIACEAE
Allophyllum gilioides (Benth.) A.& V. Grant
  dense false gilyflower
Collomia grandiflora Dougl. ex Lindl.
  largeflower mountaintrumpet
Collomia linearis Nutt.
  narrowleaf mountaintrumpet
Eriastrum diffusum (Gray) Mason
  miniature woolstar
Eriastrum eremicum (Jepson) Mason
  desert woolstar
Gilia achilleifolia Benth.
  California gilia
Gilia arizonica (Greene) Rydb.
  = Ipomopsis arizonica
Gilia clokeyi Mason
  Clokey's gilia
Gilia filiformis Parry ex Gray
  yellow gilia
Gilia flavocincta A. Nels.
  lesser yellowthroat gilia
Gilia hutchinsifolia Rydb.
  desert pale gilia
Gilia inconspicua (Sm.) Sweet
  shy gilia
Gilia latifolia S. Wats.
  broadleaf gilia
Gilia longiflora (Torr.) G. Don
  = Ipomopsis longiflora ssp. longiflora
Gilia mexicana A.& V. Grant
  El Paso gilia
Gilia minor A.& V. Grant
  little gilia
Gilia ochroleuca M.E. Jones
  volcanic gilia
Gilia ophthalmoides Brand
  eyed gilia
Gilia pumila Nutt.
  = Ipomopsis pumila
Gilia rigidula Benth.
  bluebowls
Gilia scopulorum M.E. Jones
  rock gilia
Gilia sinuata Dougl. ex Benth.
  rosy gilia
Gilia stellata Heller
  star gilia
Gilia subnuda Torr. ex Gray
  coral gilia
Gilia tenuiflora Benth.
  greater yellowthroat gilia
Gilia thurberi (Torr. ex Gray) Gray
  = Ipomopsis thurberi
Gilia transmontana (Mason & A. Grant) A.& V. Grant
  transmontane gilia
Ipomopsis aggregata (Pursh) V. Grant
  skyrocket gilia
Ipomopsis arizonica (Greene) Wherry
  Arizona skyrocket
Ipomopsis congesta (Hook.) V. Grant
  ballhead gilia
Ipomopsis gunnisonii (Torr. & Gray) V. Grant
  sanddune skyrocket
Ipomopsis laxiflora (Coult.) V. Grant
  iron skyrocket
Ipomopsis longiflora (Torr.) V. Grant
  linasa
Ipomopsis longiflora ssp. australis Fletcher & W.L. Wagner
  linasa
Ipomopsis longiflora ssp. longiflora (Torr.) V. Grant
  linasa
Ipomopsis macombii (Torr. ex Gray) V. Grant
  Macomb's skyrocket
Ipomopsis macrosiphon (Kearney & Peebles) V. Grant & Wilken
Ipomopsis multiflora (Nutt.) V. Grant
  manyflowered gilia
Ipomopsis polycladon (Torr.) V. Grant
  manybranched gilia
Ipomopsis pumila (Nutt.) V. Grant
  dwarf gilia
Ipomopsis tenuifolia (Gray) V. Grant
  slenderleaf skyrocket
Ipomopsis tenuituba (Rydb.) V. Grant
  slendertube skyrocket
Ipomopsis thurberi (Torr. ex Gray) V. Grant
  El Paso skyrocket
Langloisia setosissima (Torr. & Gray ex Torr.) Greene
  moth langloisia
Leptodactylon pungens (Torr.) Torr. ex Nutt.
  granite pricklygilia
Linanthus aureus (Nutt.) Greene
  golden deserttrumpets
Linanthus bigelovii (Gray) Greene
  Bigelow's deserttrumpets
Linanthus demissus (Gray) Greene
  desertsnow
Linanthus dichotomus Benth.
  eveningsnow
Linanthus dichotomus ssp. dichotomus Benth.
  eveningsnow
Linanthus floribundus (Gray) Greene ex Milliken
  manyflower deserttrumpets
Linanthus jonesii (Gray) Greene
  Jones' deserttrumpets
Linanthus nuttallii (Gray) Greene ex Milliken
  Nuttall's deserttrumpets
Loeselia glandulosa (Cav.) G. Don
  glandular false calico
Loeseliastrum schottii (Torr.) Timbrook
  Schott's calico
Navarretia breweri (Gray) Greene
  Brewer's navarretia
Navarretia intertexta (Benth.) Hook.
  needleleaf navarretia
Navarretia leucocephala Benth.
  whitehead navarretia
Phlox amabilis Brand
  Arizona phlox
Phlox austromontana Coville
  desert phlox
Phlox cluteana A. Nels.
  Navajo Mountain phlox
Phlox diffusa Benth.
  spreading phlox
Phlox gracilis (Hook.) Greene
  slender phlox
Phlox griseola Wherry
  grayleaf phlox
Phlox hoodii Richards.
  spiny phlox
Phlox longifolia Nutt.
  longleaf phlox
Phlox speciosa Pursh
  showy phlox
Phlox stansburyi (Torr.) Heller
  colddesert phlox
Phlox tenuifolia E. Nels.
  Santa Catalina Mountain phlox
Phlox triovulata Thurb. ex Torr.
  threeseed phlox
Phlox viridis E. Nels.
  green phlox
Polemonium foliosissimum Gray
  towering Jacobsladder
Polemonium pauciflorum S. Wats.
  fewflower Jacobsladder
Polemonium pulcherrimum Hook.
  skunkleaf polemonium
Polemonium viscosum Nutt.
  sticky polemonium

POLYGALACEAE
Monnina wrightii Gray
  blue pygmyflower
Polygala acanthoclada Gray
  desert polygala
Polygala alba Nutt.
  white milkwort
Polygala barbeyana Chod.
  blue milkwort
Polygala glochidiata Kunth
  tropical milkwort
Polygala hemipterocarpa Gray
  winged milkwort
Polygala intermontana T. Wendt
  Intermountain milkwort
Polygala lindheimeri Gray
  shrubby milkwort
Polygala macradenia Gray
  glandleaf milkwort
Polygala obscura Benth.
  velvetseed milkwort
Polygala piliophora Blake
  Huachuca Mountain milkwort
Polygala rusbyi Greene
  Rusby's milkwort
Polygala scoparioides Chod.
  broom milkwort
Polygala senega L.
  Seneca snakeroot
Polygala senega var. latifolia Torr. & Gray
  Seneca snakeroot
Polygala subspinosa S. Wats.
  spiny polygala

POLYGONACEAE
Acetosella acetosella (L.) Small
  = Rumex acetosella
Bistorta bistortoides (Pursh) Small
  = Polygonum bistortoides
Centrostegia thurberi Gray ex Benth.
  red triangles
Chorizanthe brevicornu Torr.
  brittle spineflower
Chorizanthe corrugata (Torr.) Torr. & Gray
  wrinkled spineflower
Chorizanthe rigida (Torr.) Torr. & Gray
  devil's spineflower
Chorizanthe watsonii Torr. & Gray
  fivetooth spineflower
Eriogonum abertianum Torr.
  Abert's buckwheat
Eriogonum alatum Torr.
  winged buckwheat
Eriogonum apachense Reveal
  Apache buckwheat
Eriogonum arizonicum S. Stokes ex M.E. Jones
  Arizona buckwheat
Eriogonum baileyi S. Wats.
  Bailey's buckwheat
Eriogonum brachypodum Torr. & Gray
  Parry's buckwheat
Eriogonum caespitosum Nutt.
  matted buckwheat
Eriogonum capillare Small
  San Carlos buckwheat
Eriogonum cernuum Nutt.
  nodding buckwheat
Eriogonum corymbosum Benth.
  crispleaf buckwheat
Eriogonum darrovii Kearney
  Darrow's buckwheat
Eriogonum davidsonii Greene
  Davidson's buckwheat
Eriogonum deflexum Torr.
  flatcrown buckwheat
Eriogonum deserticola S. Wats.
  Colorado Desert buckwheat
Eriogonum divaricatum Hook.
  divergent buckwheat
Eriogonum ericifolium Torr. & Gray
  Yavapai County buckwheat
Eriogonum fasciculatum Benth.
  Eastern Mojave buckwheat
Eriogonum fasciculatum var. polifolium (Benth.) Torr. & Gray
  Eastern Mojave buckwheat
Eriogonum gordonii Benth.
  Gordon's buckwheat
Eriogonum heermannii Dur. & Hilg.
  Heermann's buckwheat
Eriogonum hieraciifolium Benth.
  hawkweed buckwheat
Eriogonum hookeri S. Wats.
  Hooker's buckwheat
Eriogonum inflatum Torr. & Frem.
  Native American pipeweed
Eriogonum inflatum var. deflatum I.M. Johnston
  Native American pipeweed
Eriogonum inflatum var. inflatum Torr. & Frem.
  Native American pipeweed
Eriogonum insigne S. Wats.
  ladder buckwheat
Eriogonum jamesii Benth.
  James' buckwheat
Eriogonum jonesii S. Wats.
  Jones' buckwheat
Eriogonum lachnogynum Torr. ex Benth.
  woollycup buckwheat
Eriogonum leptocladon Torr. & Gray
  sand buckwheat
Eriogonum leptophyllum (Torr. & Gray) Woot. & Standl.
  slenderleaf buckwheat
Eriogonum maculatum Heller
  spotted buckwheat
Eriogonum microthecum Nutt.
  slender buckwheat
Eriogonum mortonianum Reveal
  Fredonia buckwheat
Eriogonum nidularium Coville
  birdnest buckwheat
Eriogonum nummulare M.E. Jones
  money buckwheat
Eriogonum ordii S. Wats.
  Fort Mojave buckwheat
Eriogonum ovalifolium Nutt.
  cushion buckwheat
Eriogonum palmerianum Reveal
  Palmer's buckwheat
Eriogonum parishii S. Wats.
  mountainmist
Eriogonum pharnaceoides Torr.
  wirestem buckwheat
Eriogonum plumatella Dur. & Hilg.
  yucca buckwheat
Eriogonum polycladon Benth.
  sorrel buckwheat
Eriogonum pusillum Torr. & Gray
  yellowturbans
Eriogonum racemosum Nutt.
  redroot buckwheat
Eriogonum reniforme Torr. & Frem.
  kidneyleaf buckwheat
Eriogonum ripleyi J.T. Howell
  Fraziers Well buckwheat
Eriogonum rotundifolium Benth.
  roundleaf buckwheat
Eriogonum shockleyi S. Wats.
  Shockley's buckwheat
Eriogonum subreniforme S. Wats.
  kidneyshape buckwheat
Eriogonum thomasii Torr.
  Thomas' buckwheat
Eriogonum thompsoniae S. Wats.
  Thompson's buckwheat
Eriogonum thurberi Torr.
  Thurber's buckwheat
Eriogonum trichopes Torr.
  little deserttrumpet
Eriogonum umbellatum Torr.
  sulphur wildbuckwheat
Eriogonum wetherillii Eastw.
  Wetherill's buckwheat
Eriogonum wrightii Torr. ex Benth.
  bastardsage
Eriogonum zionis J.T. Howell
  Zion buckwheat
Fagopyrum esculentum Moench
  buckwheat
Fagopyrum fagopyrum (L.) Karst.
  = Fagopyrum esculentum
Nemacaulis denudata Nutt.
  cottonheads
Oxyria digyna (L.) Hill
  alpine mountainsorrel
Oxytheca perfoliata Torr. & Gray
  roundleaf puncturebract
Persicaria 
  = Polygonum 
Polygonum amphibium L.
  water knotweed
Polygonum argyrocoleon Steud. ex Kunze
  silversheath knotweed
Polygonum aviculare L.
  prostrate knotweed
Polygonum bistortoides Pursh
  American bistort
Polygonum buxiforme Small
  box knotweed
Polygonum convolvulus L.
  black bindweed
Polygonum douglasii Greene
  Douglas' knotweed
Polygonum hydropiperoides Michx.
  swamp smartweed
Polygonum lapathifolium L.
  curlytop knotweed
Polygonum minimum S. Wats.
  broadleaf knotweed
Polygonum pensylvanicum L.
  Pennsylvania smartweed
Polygonum persicaria L.
  spotted ladysthumb
Polygonum polygaloides Wallich ex Meisn.
  polygala knotweed
Polygonum punctatum Ell.
  dotted smartweed
Polygonum ramosissimum Michx.
  bushy knotweed
Polygonum viviparum L.
  alpine bistort
Pterostegia drymarioides Fisch. & C.A. Mey.
  woodland pterostegia
Rumex acetosella L.
  common sheep sorrel
Rumex altissimus Wood
  pale dock
Rumex aquaticus L.
  western dock
Rumex conglomeratus Murr.
  clustered dock
Rumex crispus L.
  curly dock
Rumex densiflorus Osterhout
  denseflowered dock
Rumex dentatus L.
  toothed dock
Rumex hymenosepalus Torr.
  canaigre dock
Rumex maritimus L.
  golden dock
Rumex nematopodus Rech. f.
  Arizona dock
Rumex obtusifolius L.
  bitter dock
Rumex orthoneurus Rech. f.
  Chiricahua Mountain dock
Rumex salicifolius Weinm.
  willow dock
Rumex violascens Rech. f.
  violet dock
Stenogonum flexum (M.E. Jones) Reveal & J.T. Howell
  bent twowhorl buckwheat
Stenogonum salsuginosum Nutt.
  salty eriogonum

POLYPODIACEAE
Pleopeltis riograndensis (T. Wendt) Andrews & Windham
  Rio Grande scalypolypody
Pleopeltis thyssanolepis (A. Braun ex Klotzsch) Andrews & Windham
  scalypolypody
Polypodium amorphum Suksdorf
  irregular polypody
Polypodium glycyrrhiza D.C. Eat.
  licorice fern
Polypodium hesperium Maxon
  western polypody
Polypodium virginianum L.
  rock polypody

PONTEDERIACEAE
Eichhornia crassipes (Mart.) Solms
  common water hyacinth
Heteranthera dubia (Jacq.) MacM.
  grassleaf mudplantain
Heteranthera limosa (Sw.) Willd.
  blue mudplantain

PORTULACACEAE
Calandrinia ciliata (Ruiz & Pavon) DC.
  fringed redmaids
Cistanthe ambigua (S. Wats.) Hershkovitz
  desert pussypaws
Cistanthe monandra (Nutt.) Hershkovitz
  common pussypaws
Cistanthe parryi (Gray) Hershkovitz
  Parry's pussypaws
Claytonia chamissoi Ledeb. ex Spreng.
  = Montia chamissoi
Claytonia parviflora Dougl. ex Hook.
  streambank springbeauty
Claytonia perfoliata Donn ex Willd.
  miner's lettuce
Claytonia rosea Rydb.
  western springbeauty
Claytonia rubra (T.J. Howell) Tidestrom
  redstem springbeauty
Lewisia brachycalyx Engelm. ex Gray
  shortsepal bitterroot
Lewisia nevadensis (Gray) B.L. Robins.
  Nevada bitterroot
Lewisia pygmaea (Gray) B.L. Robins.
  pigmy bitterroot
Lewisia rediviva Pursh
  Oregon bitterroot
Montia chamissoi (Ledeb. ex Spreng.) Greene
  water minerslettuce
Montia perfoliata (Donn ex Willd.) T.J. Howell
  = Claytonia perfoliata ssp. perfoliata
Portulaca halimoides L.
  silkcotton purslane
Portulaca oleracea L.
  little hogweed
Portulaca pilosa L.
  kiss me quick
Portulaca suffrutescens Engelm.
  shrubby purslane
Portulaca umbraticola Kunth
  wingpod purslane
Talinum aurantiacum Engelm.
  orange fameflower
Talinum brevifolium Torr.
  pygmy fameflower
Talinum gooddingii P. Wilson
  Goodding's fameflower
Talinum humile Greene
  Pinos Altos fameflower
Talinum marginatum Greene
  tepic fameflower
Talinum paniculatum (Jacq.) Gaertn.
  jewels of Opar
Talinum parviflorum Nutt.
  sunbright
Talinum validulum Greene
  Tusayan fameflower

POTAMOGETONACEAE
Potamogeton X spathuliformis (J.W. Robbins) Morong (pro sp.)
  pondweed
Potamogeton americanus Cham. & Schlecht.
  = Potamogeton nodosus
Potamogeton crispus L.
  curly pondweed
Potamogeton diversifolius Raf.
  waterthread pondweed
Potamogeton filiformis Pers.
  fineleaf pondweed
Potamogeton foliosus Raf.
  leafy pondweed
Potamogeton gramineus L.
  variableleaf pondweed
Potamogeton illinoensis Morong
  Illinois pondweed
Potamogeton latifolius (J.W. Robbins) Morong
  broadleaf pondweed
Potamogeton natans L.
  floating pondweed
Potamogeton nodosus Poir.
  longleaf pondweed
Potamogeton pectinatus L.
  sago pondweed
Potamogeton pusillus L.
  small pondweed
Potamogeton richardsonii (Benn.) Rydb.
  Richardson's pondweed

PRIMULACEAE
Anagallis arvensis L.
  scarlet pimpernel
Anagallis minima (L.) Krause
  chaffweed
Androsace occidentalis Pursh
  western rockjasmine
Androsace septentrionalis L.
  pygmyflower rockjasmine
Dodecatheon alpinum (Gray) Greene
  alpine shootingstar
Dodecatheon dentatum Hook.
  white shootingstar
Dodecatheon pulchellum (Raf.) Merr.
  darkthroat shootingstar
Lysimachia ciliata L.
  fringed loosestrife
Lysimachia hybrida Michx.
  lowland yellow loosestrife
Primula parryi Gray
  Parry's primrose
Primula rusbyi Greene
  Rusby's primrose
Primula specuicola Rydb.
  cavedwelling primrose
Samolus vagans Greene
  Chiricahua Mountain brookweed
Samolus valerandi L.
  seaside brookweed

PSILOTACEAE
Psilotum nudum (L.) Beauv.
  whisk fern

PTERIDACEAE
Adiantum aleuticum (Rupr.) Paris
  Aleutian maidenhair
Adiantum capillus-veneris L.
  common maidenhair
Adiantum pedatum L.
  northern maidenhair
Argyrochosma incana (K. Presl) Windham
  hairy falsecloak fern
Argyrochosma jonesii (Maxon) Windham
  Jones' false cloak fern
Argyrochosma limitanea (Maxon) Windham
  southwestern false cloak fern
Argyrochosma microphylla (Mett. ex Kuhn) Windham
  smallleaf false cloak fern
Astrolepis cochisensis (Goodding) Benham & Windham
  Cochise scaly cloakfern
Astrolepis integerrima (Hook.) Benham & Windham
  hybrid cloakfern
Astrolepis sinuata (Lag. ex Sw.) Benham & Windham
  wavy scaly cloakfern
Bommeria hispida (Mett. ex Kuhn) Underwood
  copper fern
Cheilanthes X parishii Davenport (pro sp.)
  Parish's lipfern
Cheilanthes alabamensis (Buckl.) Kunze
  Alabama lipfern
Cheilanthes arizonica (Maxon) Mickel
  Arizona lipfern
Cheilanthes bonariensis (Willd.) Proctor
  golden lipfern
Cheilanthes covillei Maxon
  Coville's lipfern
Cheilanthes eatonii Baker
  Eaton's lipfern
Cheilanthes feei T. Moore
  slender lipfern
Cheilanthes fendleri Hook.
  Fendler's lipfern
Cheilanthes horridula Maxon
  rough lipfern
Cheilanthes lemmonii (D.C. Eat.) Domin
  = Notholaena lemmonii
Cheilanthes lendigera (Cav.) Sw.
  nitbearing lipfern
Cheilanthes lindheimeri Hook.
  fairyswords
Cheilanthes parryi (D.C. Eat.) Domin
  Parry's lipfern
Cheilanthes pringlei Davenport
  Pringle's lipfern
Cheilanthes tomentosa Link
  woolly lipfern
Cheilanthes villosa Davenport ex Maxon
  villous lipfern
Cheilanthes wootonii Maxon
  beaded lipfern
Cheilanthes wrightii Hook.
  Wright's lipfern
Notholaena aschenborniana Klotzsch
  scaled cloak fern
Notholaena californica D.C. Eat.
  California cloak fern
Notholaena grayi Davenport
  Gray's cloak fern
Notholaena lemmonii D.C. Eat.
  Lemmon's cloak fern
Notholaena neglecta Maxon
  Maxon's cloak fern
Notholaena parryi D.C. Eat.
  = Cheilanthes parryi
Notholaena standleyi Maxon
  star cloak fern
Pellaea atropurpurea (L.) Link
  purple cliffbrake
Pellaea glabella Mett. ex Kuhn
  dwarf cliffbrake
Pellaea intermedia Mett. ex Kuhn
  intermediate cliffbrake
Pellaea ternifolia (Cav.) Link
  TransPecos cliffbrake
Pellaea truncata Goodding
  spiny cliffbrake
Pellaea wrightiana Hook.
  Wright's cliffbrake
Pentagrama triangularis (Kaulfuss) Yatskievych, Windham & Wollenweber
  western goldfern

RAFFLESIACEAE
Pilostyles thurberi Gray
  stemsucker

RANUNCULACEAE
Aconitum columbianum Nutt.
  western monkshood
Aconitum infectum Greene
  Arizona monkshood
Actaea arguta Nutt.
  = Actaea rubra ssp. arguta
Actaea rubra (Ait.) Willd.
  red baneberry
Actaea rubra ssp. arguta (Nutt.) Hulten
  red baneberry
Actaea spicata var. arguta (Nutt.) Torr.
  = Actaea rubra ssp. arguta
Anemone cylindrica Gray
  candle anemone
Anemone globosa (Torr. & Gray) Nutt. ex Pritz.
  = Anemone multifida var. hudsoniana
Anemone multifida Poir.
  Pacific anemone
Anemone multifida var. globosa Torr. & Gray
  = Anemone multifida var. hudsoniana
Anemone multifida var. hudsoniana DC.
  Hudson's anemone
Anemone multifida var. multifida Poir.
  Pacific anemone
Anemone tuberosa Rydb.
  desert anemone
Aquilegia chrysantha Gray
  golden columbine
Aquilegia coerulea James
  Colorado blue columbine
Aquilegia desertorum (M.E. Jones) Cockerell ex Heller
  desert columbine
Aquilegia elegantula Greene
  western red columbine
Aquilegia longissima Gray
  longspur columbine
Aquilegia micrantha Eastw.
  Mancos columbine
Aquilegia triternata Payson
  Chiricahua Mountain columbine
Caltha biflora var. rotundifolia (Huth) C.L. Hitchc.
  = Caltha leptosepala ssp. leptosepala var. leptosepala
Caltha leptosepala DC.
  white marshmarigold
Caltha leptosepala ssp. leptosepala DC.
  white marshmarigold
Caltha leptosepala ssp. leptosepala var. leptosepala DC.
  white marshmarigold
Ceratocephala testiculata (Crantz) Bess.
  curveseed butterwort
Cimicifuga arizonica S. Wats.
  Arizona black cohosh
Clematis bigelovii Torr.
  Bigelow's leather flower
Clematis columbiana (Nutt.) Torr. & Gray
  rock clematis
Clematis columbiana var. columbiana (Nutt.) Torr. & Gray
  rock clematis
Clematis drummondii Torr. & Gray
  Drummond's clematis
Clematis hirsutissima Pursh
  hairy clematis
Clematis hirsutissima var. arizonica (Heller) Erickson
  Arizona clematis
Clematis hirsutissima var. hirsutissima Pursh
  hairy clematis
Clematis ligusticifolia Nutt.
  western white clematis
Clematis ligusticifolia var. ligusticifolia Nutt.
  western white clematis
Clematis palmeri Rose
  Palmer's leather flower
Clematis pseudoalpina (Kuntze) A. Nels.
  = Clematis columbiana var. columbiana
Consolida ajacis (L.) Schur
  doubtful knight's spur
Delphinium X confertiflorum Woot. (pro sp.)
  larkspur
Delphinium andesicola Ewan
  Chiricahua Mountain larkspur
Delphinium barbeyi (Huth) Huth
  tall larkspur
Delphinium geraniifolium Rydb.
  Clark Valley larkspur
Delphinium glaucum S. Wats.
  Sierra larkspur
Delphinium novomexicanum Woot.
  White Mountain larkspur
Delphinium nuttallianum Pritz. ex Walp.
  Nuttal's larkspur
Delphinium parishii Gray
  desert larkspur
Delphinium scaposum Greene
  tall mountain larkspur
Delphinium scopulorum Gray
  Rocky Mountain larkspur
Delphinium tenuisectum Greene
  carrotleaf larkspur
Delphinium wootonii Rydb.
  Organ Mountain larkspur
Myosurus apetalus var. montanus (Campbell) Whitemore
Myosurus cupulatus S. Wats.
  Arizona mousetail
Myosurus minumus L.
  tiny mousetail
Myosurus nitidus Eastw.
  western mousetail
Ranunculus andersonii Gray
  Anderson's buttercup
Ranunculus arizonicus J.G. Lemmon ex Gray
  Arizona buttercup
Ranunculus cardiophyllus Hook.
  heartleaf buttercup
Ranunculus cymbalaria Pursh
  alkali buttercup
Ranunculus eschscholtzii Schlecht.
  Eschscholtz's buttercup
Ranunculus eximius Greene
  tundra buttercup
Ranunculus flammula L.
  spearwort buttercup
Ranunculus glaberrimus Hook.
  sagebrush buttercup
Ranunculus hebecarpus Hook. & Arn.
  delicate buttercup
Ranunculus hydrocharoides Gray
  frogbit buttercup
Ranunculus inamoenus Greene
  graceful buttercup
Ranunculus longirostris Godr.
  longbeak buttercup
Ranunculus macounii Britt.
  Macoun's buttercup
Ranunculus macranthus Scheele
  large buttercup
Ranunculus oreogenes Greene
  Oregon buttercup
Ranunculus pedatifidus Sm.
  surefoot buttercup
Ranunculus pensylvanicus L. f.
  Pennsylvania buttercup
Ranunculus sceleratus L.
  celeryleaf buttercup
Ranunculus trichophyllus Chaix
  whitewater crowfoot
Ranunculus uncinatus D. Don ex G. Don
  hooked buttercup
Thalictrum dasycarpum Fisch. & Ave-Lall.
  purple meadowrue
Thalictrum fendleri Engelm. ex Gray
  Fendler's meadowrue
Trautvetteria caroliniensis (Walt.) Vail
  Carolina bugbane

RESEDACEAE
Oligomeris linifolia (Vahl) J.F. Macbr.
  lineleaf whitepuff

RHAMNACEAE
Ceanothus fendleri Gray
  Fendler's ceanothus, redroot
Ceanothus greggii Gray
  desert ceanothus, redroot
Ceanothus greggii ssp. greggii Gray
  desert ceanothus, redroot
Ceanothus greggii ssp. vestitus (Greene) C. Schmidt
  Mojave ceanothus, redroot
Ceanothus greggii var. perplexans (Trel.) Jepson
Ceanothus integerrimus Hook. & Arn.
  deerbrush, redroot
Ceanothus martinii M.E. Jones
  Martin's ceanothus
Colubrina californica I.M. Johnston
  Las Animas nakedwood
Condalia correllii M.C. Johnston
  Correll's snakewood
Condalia ericoides (Gray) M.C. Johnston
  javelin bush
Condalia globosa I.M. Johnston
  bitter snakewood
Condalia lycioides (Gray) Weberb.
  = Ziziphus obtusifolia var. obtusifolia
Condalia lycioides var. canescens (Gray) Trel.
  = Ziziphus obtusifolia var. canescens
Condalia mexicana Schlecht.
  Mexican bluewood
Condalia obtusifolia (Hook. ex Torr. & Gray) Weberb.
  = Ziziphus obtusifolia var. obtusifolia
Condalia spathulata Gray
  squawbush
Condalia warnockii M.C. Johnston
  Warnock's snakewood
Condalia warnockii var. kearneyana M.C. Johnston
  Kearney's snakewood
Frangula X blumeri (Greene) Kartesz & Gandhi (pro sp.)
  Blumer's buckthorn
Frangula betulifolia (Greene) V. Grub.
  beechleaf frangula
Frangula californica (Eschsch.) Gray
  California buckthorn
Rhamnus X blumeri Greene (pro sp.)
  = Frangula X blumeri
Rhamnus betulifolia Greene
  = Frangula betulifolia ssp. betulifolia
Rhamnus californica Eschsch.
  = Frangula californica ssp. californica
Rhamnus crocea Nutt.
  redberry buckthorn
Rhamnus serrata Humb. & Bonpl. ex J.A. Schultes
  sawleaf buckthorn
Sageretia wrightii S. Wats.
  Wright's mock buckthorn
Ziziphus obtusifolia (Hook. ex Torr. & Gray) Gray
  lotebush
Ziziphus obtusifolia var. canescens (Gray) M.C. Johnston
  lotebush
Ziziphus obtusifolia var. obtusifolia (Hook. ex Torr. & Gray) Gray
  lotebush

ROSACEAE
Agrimonia gryposepala Wallr.
  tall hairy agrimony
Agrimonia striata Michx.
  roadside agrimony
Amelanchier alnifolia var. oreophila (A. Nels.) R.J. Davis
  = Amelanchier utahensis ssp. utahensis
Amelanchier alnifolia var. pumila (Torr. & Gray) Schneid.
  = Amelanchier pumila
Amelanchier alnifolia var. utahensis (Koehne) M.E. Jones
  = Amelanchier utahensis ssp. utahensis
Amelanchier pumila (Torr. & Gray) Nutt. ex M. Roemer
  dwarf serviceberry
Amelanchier utahensis Koehne
  Utah serviceberry
Amelanchier utahensis ssp. covillei (Standl.) Clokey
  Coville's serviceberry
Amelanchier utahensis ssp. utahensis Koehne
  Utah serviceberry
Amygdalus persica L.
  = Prunus persica
Argentina anserina (L.) Rydb.
  silverweed cinquefoil
Cercocarpus intricatus S. Wats.
  littleleaf mountain mahogany
Cercocarpus ledifolius Nutt.
  curlleaf mountain mahogany
Cercocarpus montanus Raf.
  true mountain mahogany
Chamaebatiaria millefolium (Torr.) Maxim.
  fernbush
Coleogyne ramosissima Torr.
  blackbrush
Cowania mexicana D. Don
  = Purshia mexicana
Cowania stansburiana Torr.
  = Purshia stansburiana
Crataegus douglasii var. rivularis (Nutt.) Sarg.
  = Crataegus rivularis
Crataegus erythropoda Ashe
  cerro hawthorn
Crataegus flabellata (Spach) Kirchn.
  fanleaf hawthorn
Crataegus rivularis Nutt.
  river hawthorn
Fallugia paradoxa (D. Don) Endl. ex Torr.
  Apacheplume
Fragaria americana (Porter) Britt.
  = Fragaria vesca ssp. americana
Fragaria vesca L.
  woodland strawberry
Fragaria vesca ssp. americana (Porter) Staudt
  woodland strawberry
Fragaria vesca ssp. bracteata (Heller) Staudt
  woodland strawberry
Fragaria virginiana Duchesne
  Virginia strawberry
Fragaria virginiana ssp. virginiana Duchesne
  Virginia strawberry
Geum aleppicum Jacq.
  yellow avens
Geum macrophyllum Willd.
  largeleaf avens
Geum rossii (R. Br.) Ser.
  Ross' avens
Geum triflorum Pursh
  prairiesmoke
Holodiscus discolor (Pursh) Maxim.
  oceanspray
Holodiscus dumosus (Nutt. ex Hook.) Heller
  rockspirea
Ivesia arizonica (Eastw. ex J.T. Howell) Ertter
  rock whitefeather
Ivesia multifoliolata (Torr.) Keck
  manyleaf mousetail
Pentaphylloides floribunda (Pursh) A. Love
  shrubby cinquefoil
Persica vulgaris P. Mill.
  = Prunus persica
Petrophyton caespitosum (Nutt.) Rydb.
  mat rockspirea
Physocarpus monogynus (Torr.) Coult.
  mountain ninebark
Potentilla albiflora L.O. Williams
  whiteflower cinquefoil
Potentilla anserina L.
  = Argentina anserina
Potentilla arguta Pursh
  tall cinquefoil
Potentilla biennis Greene
  biennial cinquefoil
Potentilla concinna Richards.
  elegant cinquefoil
Potentilla crinita Gray
  bearded cinquefoil
Potentilla diversifolia Lehm.
  varileaf cinquefoil
Potentilla fruticosa auct. non L.
  = Pentaphylloides floribunda
Potentilla glandulosa Lindl.
  gland cinquefoil
Potentilla hippiana Lehm.
  woolly cinquefoil
Potentilla nivea L.
  snow cinquefoil
Potentilla norvegica L.
  Norwegian cinquefoil
Potentilla pectinisecta Rydb.
  combleaf cinquefoil
Potentilla pensylvanica L.
  Pennsylvania cinquefoil
Potentilla plattensis Nutt.
  Platte River cinquefoil
Potentilla pulcherrima Lehm.
  beautiful cinquefoil
Potentilla rivalis Nutt.
  brook cinquefoil
Potentilla sibbaldii Haller f.
  = Sibbaldia procumbens
Potentilla subviscosa Greene
  Navajo cinquefoil
Potentilla thurberi Gray
  scarlet cinquefoil
Potentilla wheeleri S. Wats.
  Kern cinquefoil
Prunus americana Marsh.
  American plum
Prunus demissa (Nutt.) Walp.
  = Prunus virginiana var. demissa
Prunus emarginata (Dougl. ex Hook.) Walp.
  bitter cherry
Prunus fasciculata (Torr.) Gray
  desert almond
Prunus fasciculata var. fasciculata (Torr.) Gray
  desert almond
Prunus melanocarpa (A. Nels.) Rydb.
  = Prunus virginiana var. melanocarpa
Prunus persica (L.) Batsch
  peach
Prunus serotina Ehrh.
  black cherry
Prunus serotina var. rufula (Woot. & Standl.) McVaugh
  black cherry
Prunus virginiana L.
  common chokecherry
Prunus virginiana var. demissa (Nutt.) Torr.
  western chokecherry
Prunus virginiana var. melanocarpa (A. Nels.) Sarg.
  black chokecherry
Purshia X subintegra (Kearney) Henrickson
  subintegra bitterbrush
Purshia glandulosa Curran
  desert bitterbrush
Purshia mexicana (D. Don) Henrickson
  Mexican cliffrose
Purshia mexicana var. stansburiana (Torr.) Welsh
  = Purshia stansburiana
Purshia stansburiana (Torr.) Henrickson
  Stansbury cliffrose
Purshia tridentata (Pursh) DC.
  antelope bitterbrush
Purshia tridentata var. glandulosa (Curran) M.E. Jones
  = Purshia glandulosa
Rosa manca Greene
  Mancos rose
Rosa stellata Woot.
  desert rose
Rosa woodsii Lindl.
  Woods' rose
Rubus arizonensis Focke
  Arizona dewberry
Rubus discolor Weihe & Nees
  Himalayan blackberry
Rubus idaeus L.
  American red raspberry
Rubus idaeus ssp. strigosus (Michx.) Focke
  grayleaf red raspberry
Rubus leucodermis Dougl. ex Torr. & Gray
  whitebark raspberry
Rubus leucodermis var. leucodermis Dougl. ex Torr. & Gray
  whitebark raspberry
Rubus neomexicanus Gray
  New Mexico raspberry
Rubus parviflorus Nutt.
  thimbleberry
Rubus parviflorus var. parviflorus Nutt.
  western thimbleberry
Rubus strigosus Michx.
  = Rubus idaeus ssp. strigosus
Sanguisorba annua (Nutt. ex Hook.) Torr. & Gray
  prairie burnet
Sanguisorba minor Scop.
  small burnet
Sibbaldia procumbens L.
  creeping sibbaldia
Sorbus dumosa Greene
  Arizona mountainash
Sorbus scopulina Greene
  Greene mountainash
Spiraea discolor Pursh
  = Holodiscus discolor
Vauquelinia californica (Torr.) Sarg.
  Arizona rosewood
Vauquelinia californica ssp. pauciflora (Standl.) Hess & Henrickson
  Arizona rosewood
Vauquelinia californica ssp. sonorensis Hess & Henrickson
  Sonora rosewood

RUBIACEAE
Bouvardia ternifolia (Cav.) Schlecht.
  firecrackerbush
Cephalanthus occidentalis L.
  common buttonbush
Crusea diversifolia (Kunth) W.A. Anderson
  mountain saucerflower
Crusea wrightii Gray
  = Crusea diversifolia
Diodia teres Walt.
  poorjoe
Galium aparine L.
  stickywilly
Galium bifolium S. Wats.
  twinleaf bedstraw
Galium boreale L.
  northern bedstraw
Galium collomiae J.T. Howell
  Fossil Hill Creek bedstraw
Galium coloradoense W. Wight
  Colorado bedstraw
Galium fendleri Gray
  Fendler's bedstraw
Galium magnifolium (Dempster) Dempster
  largeleaf bedstraw
Galium mexicanum Kunth
  Mexican bedstraw
Galium microphyllum Gray
  bracted bedstraw
Galium munzii Hilend & Howell
  Munz's bedstraw
Galium obtusum Bigelow
  bluntleaf bedstraw
Galium pilosum Ait.
  hairy bedstraw
Galium proliferum Gray
  limestone bedstraw
Galium rothrockii Gray
  = Galium wrightii
Galium stellatum Kellogg
  starry bedstraw
Galium tinctorium (L.) Scop.
  stiff marsh bedstraw
Galium trifidum L.
  threepetal bedstraw
Galium triflorum Michx.
  fragrant bedstraw
Galium wrightii Gray
  Wright's bedstraw
Hedyotis greenei (Gray) W.H. Lewis
  Greene's starviolet
Hedyotis nigricans (Lam.) Fosberg
  diamondflowers
Houstonia rubra Cav.
  red bluet
Houstonia wrightii Gray
  pygmy bluet
Kelloggia galioides Torr.
  milk kelloggia
Mitracarpus breviflorus Gray
  white girdlepod
Sherardia arvensis L.
  blue fieldmadder

RUPPIACEAE
Ruppia maritima L.
  widgeongrass

RUTACEAE
Choisya arizonica Standl.
  = Choisya dumosa var. arizonica
Choisya dumosa (Torr.) Gray
  Mexican orange
Choisya dumosa var. arizonica (Standl.) L. Benson
  Arizonia Mexican orange
Choisya dumosa var. mollis (Standl.) L. Benson
  Mexican orange
Ptelea angustifolia Benth.
  = Ptelea trifoliata ssp. angustifolia var. angustifolia
Ptelea pallida Greene
  = Ptelea trifoliata ssp. pallida var. pallida
Ptelea trifoliata L.
  common hoptree
Ptelea trifoliata ssp. angustifolia (Benth.) V. Bailey
  common hoptree
Ptelea trifoliata ssp. angustifolia var. angustifolia (Benth.) M.E. Jones
  common hoptree
Ptelea trifoliata ssp. pallida (Greene) V. Bailey
  common hoptree
Ptelea trifoliata ssp. pallida var. cognata (Greene) Kearney & Peebles
  common hoptree
Ptelea trifoliata ssp. pallida var. lutescens (Greene) V. Bailey
  common hoptree
Ptelea trifoliata ssp. pallida var. pallida (Greene) V. Bailey
  pallid hoptree
Ptelea trifoliata ssp. polyadenia (Greene) V. Bailey
  common hoptree
Thamnosma montana Torr. & Frem.
  turpentinebroom
Thamnosma texana (Gray) Torr.
  rue of the mountains

SALICACEAE
Populus X acuminata Rydb. (pro sp.)
  lanceleaf cottonwood
Populus angustifolia James
  narrowleaf cottonwood
Populus deltoides Bartr. ex Marsh.
  eastern cottonwood
Populus deltoides ssp. wislizeni (S. Wats.) Eckenwalder
  Rio Grande cottonwood
Populus fremontii S. Wats.
  Fremont's cottonwood
Populus fremontii ssp. fremontii S. Wats.
  Fremont's cottonwood
Populus fremontii ssp. mesetae Eckenwalder
  Fremont's cottonwood
Populus nigra L.
  Lombardy poplar
Populus tremuloides Michx.
  quaking aspen
Populus wislizeni (S. Wats.) Sarg.
  = Populus deltoides ssp. wislizeni
Salix amygdaloides Anderss.
  peachleaf willow
Salix arizonica Dorn
  Arizona willow
Salix bebbiana Sarg.
  Bebb willow
Salix bonplandiana Kunth
  red willow
Salix geyeriana Anderss.
  Geyer's willow
Salix gooddingii Ball
  Goodding's willow
Salix irrorata Anderss.
  sandbar willow
Salix lasiolepis Benth.
  arroyo willow
Salix lasiolepis var. lasiolepis Benth.
  Tracy willow
Salix ligulifolia (Ball) Ball ex Schneid.
  strapleaf willow
Salix lucida Muhl.
  shining willow
Salix lutea Nutt.
  yellow willow
Salix monticola Bebb
  park willow
Salix myrtillifolia Anderss.
  blueberry willow
Salix planifolia Pursh
  diamondleaf willow
Salix scouleriana Barratt ex Hook.
  Scouler's willow
Salix taxifolia Kunth
  yewleaf willow

SANTALACEAE
Comandra pallida A. DC.
  = Comandra umbellata ssp. pallida
Comandra umbellata (L.) Nutt.
  bastard toadflax
Comandra umbellata ssp. californica (Eastw. ex Rydb.) Piehl
  California bastard toadflax
Comandra umbellata ssp. pallida (A. DC.) Piehl
  pale bastard toadflax

SAPINDACEAE
Cardiospermum corindum L.
  faux persil
Dodonaea viscosa (L.) Jacq.
  Florida hopbush
Sapindus drummondii Hook. & Arn.
  = Sapindus saponaria var. drummondii
Sapindus saponaria L.
  wingleaf soapberry
Sapindus saponaria var. drummondii (Hook. & Arn.) L. Benson
  western soapberry

SAPOTACEAE
Bumelia 
  = Sideroxylon 
Sideroxylon lanuginosum Michx.
  gum bully
Sideroxylon lanuginosum ssp. rigidum (Gray) T.D. Pennington
  gum bully

SAURURACEAE
Anemopsis californica (Nutt.) Hook. & Arn.
  yerba mansa

SAXIFRAGACEAE
Heuchera eastwoodiae Rosendahl, Butters & Lakela
  Senator Mine alumroot
Heuchera glomerulata Rosendahl, Butters & Lakela
  Chiricahua Mountain alumroot
Heuchera novomexicana Wheelock
  New Mexico alumroot
Heuchera parvifolia Nutt. ex Torr. & Gray
  littleleaf alumroot
Heuchera parvifolia var. arizonica Rosendahl, Butters & Lakela
  Arizona alumroot
Heuchera parvifolia var. flavescens (Rydb.) Rosendahl, Butters & Lakela
  littleleaf alumroot
Heuchera rubescens Torr.
  pink alumroot
Heuchera sanguinea Engelm.
  coralbells
Lithophragma tenellum Nutt.
  slender woodlandstar
Parnassia parviflora DC.
  smallflower grass of Parnassus
Saxifraga cespitosa L.
  tufted alpine saxifrage
Saxifraga eriophora S. Wats.
  redfuzz saxifrage
Saxifraga flagellaris Willd. ex Sternb.
  whiplash saxifrage
Saxifraga odontoloma Piper
  brook saxifrage
Saxifraga rhomboidea Greene
  diamondleaf saxifrage
Saxifraga rivularis L.
  weak saxifrage

SCROPHULARIACEAE
Bacopa monnieri (L.) Pennell
  herb of grace
Bacopa rotundifolia (Michx.) Wettst.
  disk waterhyssop
Besseya arizonica Pennell
  Arizona coraldrops
Besseya plantaginea (James) Rydb.
  White River coraldrops
Brachystigma wrightii (Gray) Pennell
  Arizona desert foxglove
Buchnera arizonica (Gray) Pennell
  Arizona bluehearts
Castilleja angustifolia (Nutt.) G. Don
  northwestern Indian paintbrush
Castilleja applegatei Fern.
  wavyleaf Indian paintbrush
Castilleja attenuata (Gray) Chuang & Heckard
  attenuate Indian paintbrush
Castilleja austromontana Standl. & Blumer
  Rincon Mountain Indian paintbrush
Castilleja exserta (Heller) Chuang & Heckard
  exserted Indian paintbrush
Castilleja integra Gray
  wholeleaf Indian paintbrush
Castilleja kaibabensis N. Holmgren
  Kaibab Plateau Indian paintbrush
Castilleja lanata Gray
  Sierran woolly Indian paintbrush
Castilleja linariifolia Benth.
  Wyoming Indian paintbrush
Castilleja lineata Greene
  marshmeadow Indian paintbrush
Castilleja miniata Dougl. ex Hook.
  scarlet Indian paintbrush
Castilleja minor (Gray) Gray
  lesser Indian paintbrush
Castilleja patriotica Fern.
  Huachuca Mountain Indian paintbrush
Castilleja sessiliflora Pursh
  downy paintedcup
Castilleja sulphurea Rydb.
  sulphur Indian paintbrush
Castilleja tenuiflora Benth.
  Santa Catalina Indian paintbrush
Collinsia parviflora Lindl.
  smallflower blue eyed Mary
Cordylanthus laxiflorus Gray
  nodding bird's beak
Cordylanthus maritimus Nutt. ex Benth.
  saltmarsh bird's beak
Cordylanthus nevinii Gray
  Nevin's bird's beak
Cordylanthus parviflorus (Ferris) Wiggins
  purple bird's beak
Cordylanthus wrightii Gray
  Wright's bird's beak
Cordylanthus wrightii ssp. tenuifolius (Pennell) Chuang & Heckard
  Wright's bird's beak
Epixiphium wislizeni (Engelm. ex Gray) Munz
  balloonbush
Gratiola neglecta Torr.
  clammy hedgehyssop
Keckiella antirrhinoides (Benth.) Straw
  snapdragon penstemon
Limosella acaulis Sesse & Moc.
  Owyhee mudwort
Limosella aquatica L.
  water mudwort
Limosella pubiflora Pennell
  Chiricahua Mountain mudwort
Linaria canadensis var. texana (Scheele) Pennell
  = Nuttallanthus texanus
Linaria dalmatica (L.) P. Mill.
  Dalmatian toadflax
Linaria texana Scheele
  = Nuttallanthus texanus
Linaria vulgaris P. Mill.
  butter and eggs, toadflax
Lindernia dubia (L.) Pennell
  moistbank pimpernel
Mabrya acerifolia (Pennell) Elisens
  brittlestem
Maurandella antirrhiniflora (Humb. & Bonpl. ex Willd.) Rothm.
  roving sailor
Maurandya acerifolia Pennell
  = Mabrya acerifolia
Maurandya antirrhiniflora Humb. & Bonpl. ex Willd.
  = Maurandella antirrhiniflora
Maurandya wislizeni Engelm. ex Gray
  = Epixiphium wislizeni
Mecardonia procumbens (P. Mill.) Small
  baby jumpup
Mimetanthe pilosa (Benth.) Greene
  false monkeyflower
Mimulus bigelovii (Gray) Gray
  Bigelow's monkeyflower
Mimulus cardinalis Dougl. ex Benth.
  crimson monkeyflower
Mimulus dentilobus B.L. Robins. & Fern.
  toothpetal monkeyflower
Mimulus eastwoodiae Rydb.
  Eastwood's monkeyflower
Mimulus floribundus Lindl.
  manyflowered monkeyflower
Mimulus glabratus Kunth
  roundleaf monkeyflower
Mimulus guttatus DC.
  seep monkeyflower
Mimulus parryi Gray
  annual redspot monkeyflower
Mimulus pilosus (Benth.) S. Wats.
  = Mimetanthe pilosa
Mimulus primuloides Benth.
  primrose monkeyflower
Mimulus rubellus Gray
  red monkeyflower
Mimulus spissus A.L. Grant
  compact monkeyflower
Mimulus suksdorfii Gray
  Suksdorf's monkeyflower
Mimulus tilingii Regel
  Tiling's monkeyflower
Mimulus verbenaceus Greene
  crimson monkeyflower
Mohavea breviflora Coville
  golden desertsnapdragon
Mohavea confertiflora (A. DC.) Heller
  ghostflower
Neogaerrhinum filipes (Gray) Rothm.
  Filipes snapdragon
Nuttallanthus texanus (Scheele) D.A. Sutton
  Texas toadflax
Orthocarpus luteus Nutt.
  yellow owlclover
Orthocarpus purpurascens var. purpurascens Benth.
  red owlclover
Orthocarpus purpureoalbus Gray ex S. Wats.
  purplewhite owlclover
Pedicularis centranthera Gray
  dwarf lousewort
Pedicularis grayi A. Nels.
  = Pedicularis procera
Pedicularis groenlandica Retz.
  elephanthead lousewort
Pedicularis parryi Gray
  Parry's lousewort
Pedicularis parryi ssp. mogollonica (Greene) G.D. Carr
  Mogollon lousewort
Pedicularis parryi ssp. parryi Gray
  Parry's lousewort
Pedicularis procera Gray
  giant lousewort
Pedicularis racemosa Dougl. ex Benth.
  sickletop lousewort
Pedicularis racemosa ssp. alba Pennell
  sickletop lousewort
Penstemon X crideri A. Nels. (pro sp.)
  Crider's penstemon
Penstemon X mirus A. Nels. (pro sp.)
  penstemon
Penstemon albomarginatus M.E. Jones
  whitemargin beardtongue
Penstemon ambiguus Torr.
  gilia beardtongue
Penstemon ammophilus N. Holmgren & L. Shultz
  sandloving penstemon
Penstemon angustifolius Nutt. ex Pursh
  broadbeard beardtongue
Penstemon barbatus (Cav.) Roth
  beardlip penstemon
Penstemon bicolor (Brandeg.) Clokey & Keck
  pinto beardtongue
Penstemon breviculus (Keck) Nisbet & R.C. Jackson
  shortstem beardtongue
Penstemon caespitosus Nutt. ex Gray
  mat penstemon
Penstemon clutei A. Nels.
  Sunset Crater beardtongue
Penstemon cobaea Nutt.
  cobaea beardtongue
Penstemon comarrhenus Gray
  dusty beardtongue
Penstemon dasyphyllus Gray
  Cochise beardtongue
Penstemon deaveri Crosswhite
  Mt. Graham beardtongue
Penstemon discolor Keck
  Cataiina beardtongue
Penstemon distans N. Holmgren
  Mt. Tumbull beardtongue
Penstemon eatonii Gray
  Eaton's penstemon
Penstemon fendleri Torr. & Gray
  Fendler's penstemon
Penstemon laevis Pennell
  southwestern beardtongue
Penstemon lentus Pennell
  handsome beardtongue
Penstemon linarioides Gray
  toadflax penstemon
Penstemon nudiflorus Gray
  Flagstaff beardtongue
Penstemon oliganthus Woot. & Standl.
  Apache beardtongue
Penstemon ophianthus Pennell
  coiled anther penstemon
Penstemon pachyphyllus Gray ex Rydb.
  thickleaf beardtongue
Penstemon palmeri Gray
  Palmer's penstemon
Penstemon parryi (Gray) Gray
  Parry's beardtongue
Penstemon petiolatus Brandeg.
  petiolate beardtongue
Penstemon pinifolius Greene
  pineneedle beardtongue
Penstemon pseudoputus (Crosswhite) N. Holmgren
  Kaibab Plateau beardtongue
Penstemon pseudospectabilis M.E. Jones
  desert penstemon
Penstemon putus A. Nels.
  Black River beardtongue
Penstemon ramosus Crosswhite
  lanceleaf beardtongue
Penstemon rostriflorus Kellogg
  Bridge penstemon
Penstemon rydbergii A. Nels.
  Rydberg's penstemon
Penstemon stenophyllus (Gray) T.J. Howell
  Sonoran beardtongue
Penstemon strictiformis Rydb.
  Mancos penstemon
Penstemon strictus Benth.
  Rocky Mountain penstemon
Penstemon subulatus M.E. Jones
  hackberry beardtongue
Penstemon superbus A. Nels.
  superb beardtongue
Penstemon thompsoniae (Gray) Rydb.
  Thompson's beardtongue
Penstemon thurberi Torr.
  Thurber's penstemon
Penstemon utahensis Eastw.
  Utah penstemon
Penstemon virgatus Gray
  upright blue beardtongue
Penstemon watsonii Gray
  Watson's penstemon
Penstemon whippleanus Gray
  Whipple's penstemon
Pseudorontium cyathiferum (Benth.) Rothm.
  dogsmouth
Rhinanthus crista-galli L. p.p.
  = Rhinanthus minor ssp. minor
Rhinanthus minor L.
  little yellowrattle
Rhinanthus minor ssp. minor L.
  cockscomb rhinanthus
Sairocarpus kingii (S. Wats.) D.A. Sutton
  King's snapdragon
Sairocarpus nuttallianus (Benth. ex A. DC.) D.A. Sutton
  Nuttall's snapdragon
Schistophragma intermedia (Gray) Pennell
  harlequin spiralseed
Scrophularia parviflora Woot. & Standl.
  pineland figwort
Seymeria bipinnatisecta Seem.
  Eagle Pass blacksenna
Stemodia durantifolia (L.) Sw.
  whitewoolly twintip
Verbascum blattaria L.
  moth mullein
Verbascum thapsus L.
  common mullein
Verbascum virgatum Stokes
  wand mullein
Veronica americana Schwein. ex Benth.
  American speedwell
Veronica anagallis-aquatica L.
  water speedwell
Veronica arvensis L.
  corn speedwell
Veronica peregrina L.
  neckweed
Veronica peregrina ssp. xalapensis (Kunth) Pennell
  hairy purslane speedwell
Veronica persica Poir.
  birdeye speedwell
Veronica polita Fries
  gray field speedwell
Veronica serpyllifolia L.
  thymeleaf speedwell
Veronica wormskjoldii Roemer & J.A. Schultes
  American alpine speedwell

SELAGINELLACEAE
Selaginella X neomexicana Maxon (pro sp.)
  New Mexican spikemoss
Selaginella arizonica Maxon
  Arizona spikemoss
Selaginella densa Rydb.
  lesser spikemoss
Selaginella eremophila Maxon
  desert spikemoss
Selaginella leucobryoides Maxon
  Mojave spikemoss
Selaginella mutica D.C. Eat. ex Underwood
  bluntleaf spikemoss
Selaginella rupincola Underwood
  rockloving spikemoss
Selaginella underwoodii Hieron.
  Underwood's spikemoss
Selaginella watsonii Underwood
  Watson's spikemoss

SIMAROUBACEAE
Ailanthus altissima (P. Mill.) Swingle
  tree of heaven
Castela emoryi (Gray) Moran & Felger
  chaparro amargosa
Castela erecta Turp.
  goatbush
Holacantha emoryi Gray
  = Castela emoryi

SIMMONDSIACEAE
Simmondsia chinensis (Link) Schneid.
  jojoba

SOLANACEAE
Calibrachoa parviflora (Juss.) D'Arcy
  seaside petunia
Capsicum annuum L.
  cayenne pepper
Capsicum annuum var. annuum L.
  cayenne pepper
Capsicum annuum var. glabriusculum (Dunal) Heiser & Pickersgill
  cayenne pepper
Capsicum baccatum auct. non L.
  = Capsicum annuum var. annuum
Capsicum frutescens sensu Standl.
  = Capsicum annuum var. annuum
Chamaesaracha coronopus (Dunal) Gray
  greenleaf five eyes
Datura discolor Bernh.
  desert thornapple
Datura ferox L.
  Chinese thornapple
Datura inoxia P. Mill.
  pricklyburr
Datura meteloides DC. ex Dunal
  = Datura wrightii
Datura stramonium L.
  jimsonweed
Datura tatula L.
  = Datura stramonium
Datura wrightii Regel
  sacred thornapple
Jaltomata procumbens (Cav.) J.L. Gentry
  creeping false holly
Lycium andersonii Gray
  Anderson's wolfberry
Lycium berlandieri Dunal
  Berlandier's wolfberry
Lycium californicum Nutt. ex Gray
  California desertthorn
Lycium cooperi Gray
  Cooper's wolfberry
Lycium exsertum Gray
  Arizona desertthorn
Lycium fremontii Gray
  Fremont's desertthorn
Lycium macrodon Gray
  desert wolfberry
Lycium pallidum Miers
  pale wolfberry
Lycium pallidum var. pallidum Miers
  pale desertthorn
Lycium parishii Gray
  Parish's desertthorn
Lycium torreyi Gray
  squawthorn
Lycopersicon esculentum P. Mill.
  garden tomato
Margaranthus solanaceus Schlecht.
  netted globecherry
Nicotiana attenuata Torr. ex S. Wats.
  coyote tobacco
Nicotiana clevelandii Gray
  Cleveland's tobacco
Nicotiana glauca Graham
  tree tobacco
Nicotiana obtusifolia Mertens & Galeotti
Nicotiana obtusifolia var. obtusifolia Mertens & Galeotti
Nicotiana obtusifolia var. palmeri (Gray) Kartesz, comb. nov. ined.
Nicotiana trigonophylla Dunal
  = Nicotiana obtusifolia var. obtusifolia
Nicotiana trigonophylla var. palmeri (Gray) M.E. Jones
  = Nicotiana obtusifolia var. palmeri
Nicotiana trigonophylla var. trigonophylla Dunal
  desert tobacco
Physalis acutifolia (Miers) Sandw.
  sharpleaf groundcherry
Physalis angulata L.
  cutleaf groundcherry
Physalis caudella Standl.
  southwestern groundcherry
Physalis crassifolia Benth.
  yellow nightshade groundcherry
Physalis fendleri Gray
  = Physalis hederifolia var. fendleri
Physalis hederifolia Gray
  ivyleaf groundcherry
Physalis heterophylla Nees
  clammy groundcherry
Physalis hispida (Waterfall) Cronq.
  prairie groundcherry
Physalis latiphysa Waterfall
  broadleaf groundcherry
Physalis lobata Torr.
  = Quincula lobata
Physalis longifolia Nutt.
  longleaf groundcherry
Physalis philadelphica Lam.
  Mexican groundcherry
Physalis pubescens L.
  husk tomato
Physalis subulata Rydb.
  Chihuahuan groundcherry
Quincula lobata (Torr.) Raf.
  Chinese lantern
Salpichroa origanifolia (Lam.) Baill.
  lily of the valley vine
Solanum americanum P. Mill.
  American black nightshade
Solanum carolinense L.
  Carolina horsenettle
Solanum deflexum Greenm.
  sonoita nightshade
Solanum douglasii Dunal
  greenspot nightshade
Solanum elaeagnifolium Cav.
  silverleaf nightshade
Solanum fendleri Gray ex Torr.
  Fendler's horsenettle
Solanum heterodoxum Dunal
  melonleaf nightshade
Solanum hindsianum Benth.
  Hinds' nightshade
Solanum jamesii Torr.
  wild potato
Solanum lumholtzianum Bartlett
  Sonoran nightshade
Solanum nigrum auct. non L.
  = Solanum ptychanthum
Solanum pinnatisectum Dunal
  tansyleaf nightshade
Solanum ptychanthum Dunal
  nightshade
Solanum rostratum Dunal
  buffalobur nightshade
Solanum sarrachoides Sendtner
  nightshade
Solanum sisymbriifolium Lam.
  sticky nightshade
Solanum triflorum Nutt.
  cutleaf nightshade
Solanum umbelliferum Eschsch.
  bluewitch nightshade
Solanum xanti Gray
  purple nightshade
Solanum xanti var. xanti Gray
  Xant's nightshade

SPHENOCLEACEAE
Sphenoclea zeylanica Gaertn.
  sphenoclea

STERCULIACEAE
Ayenia ardua Cristobal
  wingstem ayenia
Ayenia compacta Rose
  California ayenia
Ayenia filiformis S. Wats.
  TransPecos ayenia
Ayenia insulicola Cristobal
  dwarf ayenia
Ayenia microphylla Gray
  dense ayenia
Fremontia 
  = Fremontodendron 
Fremontodendron californicum (Torr.) Coville
  California flannelbush
Hermannia pauciflora S. Wats.
  Santa Catalina burstwort
Waltheria indica L.
  uhaloa

TAMARICACEAE
Tamarix africana Poir.
  African tamarisk
Tamarix aphylla (L.) Karst.
  Athel tamarisk
Tamarix canariensis Willd.
  Canary Island tamarisk
Tamarix chinensis Lour.
  fivestamen tamarisk
Tamarix parviflora DC.
  smallflower tamarisk
Tamarix ramosissima Ledeb.
  saltcedar

THELYPTERIDACEAE
Dryopteris augescens (Link) C. Christens.
  = Thelypteris augescens
Dryopteris feei C. Christens.
  = Thelypteris puberula var. puberula
Thelypteris augescens (Link) Munz & Johnston
  abrupttip maiden fern
Thelypteris puberula (Baker) Morton
  showy maiden fern
Thelypteris puberula var. puberula (Baker) Morton
  showy maiden fern
Thelypteris puberula var. sonorensis A.R. Sm.
  Sonoran maiden fern

TILIACEAE
Corchorus hirtus L.
  Orinoco jute
Corchorus orinocensis Kunth
  red jute

TYPHACEAE
Typha angustifolia L.
  narrowleaf cattail
Typha domingensis Pers.
  southern cattail
Typha latifolia L.
  broadleaf cattail

ULMACEAE
Celtis douglasii Planch.
  = Celtis laevigata var. reticulata
Celtis laevigata Willd.
  sugarberry
Celtis laevigata var. brevipes (S. Wats.) Sarg.
  sugarberry
Celtis laevigata var. reticulata (Torr.) L. Benson
  netleaf hackberry
Celtis occidentalis var. reticulata (Torr.) Sarg.
  = Celtis laevigata var. reticulata
Celtis pallida Torr.
  spiny hackberry
Celtis reticulata Torr.
  = Celtis laevigata var. reticulata
Ulmus pumila L.
  Siberian elm

UMBELLIFERAE
Aletes davidsonii Coult. & Rose
  = Pteryxia davidsonii
Aletes macdougalii Coult. & Rose
  MacDougal's aletes
Aletes petraea (M.E. Jones) W.A. Weber
  = Pteryxia petraea
Ammi majus L.
  bishopweed
Ammoselinum giganteum Coult. & Rose
  western sandparsley
Anethum graveolens L.
  dill
Angelica pinnata S. Wats.
  smallleaf angelica
Anthriscus caucalis Bieb.
  burr chervil
Apiastrum angustifolium Nutt.
  mock parsley
Apium graveolens L.
  wild celery
Berula erecta (Huds.) Coville
  cutleaf waterparsnip
Bowlesia incana Ruiz & Pavon
  hoary bowlesia
Bupleurum lancifolium Hornem.
  lanceleaf thorow wax
Bupleurum rotundifolium L.
  hare's ear
Chaerophyllum tainturieri Hook.
  hairyfruit chervil
Ciclospermum leptophyllum (Pers.) Sprague ex Britt. & Wilson
  marsh parsley
Cicuta maculata L.
  spotted water hemlock
Cicuta maculata var. angustifolia Hook.
  spotted water hemlock
Cicuta maculata var. bolanderi (S. Wats.) Mulligan
Cicuta maculata var. maculata L.
  spotted water hemlock
Conioselinum mexicanum Coult. & Rose
  Mexican hemlockparsley
Conioselinum scopulorum (Gray) Coult. & Rose
  Rocky Mountain hemlockparsley
Conium maculatum L.
  poison hemlock
Coriandrum sativum L.
  Chinese parsley
Cymopterus acaulis (Pursh) Raf.
  plains springparsley
Cymopterus acaulis var. fendleri (Gray) Goodrich
  chimaja
Cymopterus bulbosus A. Nels.
  bulbous springparsley
Cymopterus fendleri Gray
  = Cymopterus acaulis var. fendleri
Cymopterus megacephalus M.E. Jones
  largeleaf springparsley
Cymopterus multinervatus (Coult. & Rose) Tidestrom
  purplenerve springparsley
Cymopterus newberryi (S. Wats.) M.E. Jones
  sweetroot springparsley
Cymopterus purpurascens (Gray) M.E. Jones
  widewing springparsley
Cymopterus purpureus S. Wats.
  purple springparsley
Cymopterus terebinthinus var. petraeus (M.E. Jones) Goodrich
  = Pteryxia petraea
Daucus carota L.
  Queen Anne's lace
Daucus pusillus Michx.
  American wild carrot
Eryngium heterophyllum Engelm.
  Wright's eryngo
Eryngium lemmonii Coult. & Rose
  Chiricahua Mountain eryngo
Eryngium nasturtiifolium Juss. ex Delar. f.
  hierba del sapo
Eryngium phyteumae Delar. f.
  Huachuca Mountain eryngo
Eryngium sparganophyllum Hemsl.
  Arizona eryngo
Eryngium wrightii Gray
  = Eryngium heterophyllum
Foeniculum vulgare P. Mill.
  sweet fennel
Heracleum lanatum Michx.
  = Heracleum maximum
Heracleum maximum Bartr.
  common cowparsnip
Heracleum sphondylium 
  = Heracleum maximum
Hydrocotyle ranunculoides L. f.
  floating marshpennywort
Hydrocotyle verticillata Thunb.
  whorled marshpennywort
Leptotaenia multifida Nutt.
  = Lomatium dissectum var. multifidum
Ligusticum porteri Coult. & Rose
  Porter's licoriceroot
Lilaeopsis schaffneriana (Schlecht.) Coult. & Rose
  Schaffner's grasswort
Lomatium bicolor (S. Wats.) Coult. & Rose
  Wasatch desertparsley
Lomatium dissectum (Nutt.) Mathias & Constance
  fernleaf buscuitroot
Lomatium dissectum var. multifidum (Nutt.) Mathias & Constance
  carrotleaf biscuitroot
Lomatium foeniculaceum (Nutt.) Coult. & Rose
  desert biscuitroot
Lomatium mohavense (Coult. & Rose) Coult. & Rose
  Mojave desertparsley
Lomatium nevadense (S. Wats.) Coult. & Rose
  Nevada biscuitroot
Lomatium nevadense var. nevadense (S. Wats.) Coult. & Rose
  Nevada biscuitroot
Lomatium nevadense var. parishii (Coult. & Rose) Jepson
  Parish's biscuitroot
Lomatium orientale Coult. & Rose
  Northern Idaho biscuitroot
Lomatium parryi (S. Wats.) J.F. Macbr.
  Utah desertparsley
Lomatium scabrum (Coult. & Rose) Mathias
  rough desertparsley
Oreoxis alpina (Gray) Coult. & Rose
  alpine oreoxis
Osmorhiza berteroi DC.
  sweetcicely
Osmorhiza brachypoda Torr.
  California sweetcicely
Osmorhiza chilensis Hook. & Arn.
  = Osmorhiza berteroi
Osmorhiza depauperata Phil.
  bluntseed sweetroot
Oxypolis fendleri (Gray) Heller
  Fendler's cowbane
Pastinaca sativa L.
  wild parsnip
Perideridia gairdneri (Hook. & Arn.) Mathias
  yampa
Perideridia parishii (Coult. & Rose) A. Nels. & J.F. Macbr.
  Parish's yampah
Pseudocymopterus montanus (Gray) Coult. & Rose
  alpine false springparsley
Pteryxia davidsonii (Coult. & Rose) Mathias & Constance
  Davidson's wavewing
Pteryxia petraea (M.E. Jones) Coult. & Rose
  rockloving desertparsley
Scandix pecten-veneris L.
  shepherdsneedle
Sium suave Walt.
  hemlock waterparsnip
Spermolepis echinata (Nutt. ex DC.) Heller
  bristly scaleseed
Torilis nodosa (L.) Gaertn.
  knotted hedgeparsley
Yabea microcarpa (Hook. & Arn.) K.-Pol.
  falsecarrot

URTICACEAE
Boehmeria cylindrica (L.) Sw.
  smallspike false nettle
Parietaria hespera Hinton
  rillita pellitory
Parietaria pensylvanica Muhl. ex Willd.
  Pennsylvania pellitory
Urtica dioica L.
  stinging nettle
Urtica dioica ssp. gracilis (Ait.) Seland.
  California nettle
Urtica dioica ssp. holosericea (Nutt.) Thorne
  stinging nettle
Urtica gracilenta Greene
  mountain nettle
Urtica gracilis Ait.
  = Urtica dioica ssp. gracilis
Urtica holosericea Nutt.
  = Urtica dioica ssp. holosericea
Urtica lyallii S. Wats.
  = Urtica dioica ssp. gracilis
Urtica urens L.
  dwarf nettle

VALERIANACEAE
Plectritis ciliosa (Greene) Jepson
  longspur seablush
Valeriana acutiloba Rydb.
  sharpleaf valerian
Valeriana acutiloba var. acutiloba Rydb.
  sharpleaf valerian
Valeriana arizonica Gray
  Arizona valerian
Valeriana capitata ssp. acutiloba (Rydb.) F.G. Mey.
  = Valeriana acutiloba var. acutiloba
Valeriana edulis Nutt. ex Torr. & Gray
  edible valerian
Valeriana edulis var. edulis Nutt. ex Torr. & Gray
  tobacco root
Valeriana occidentalis Heller
  western valerian
Valeriana sorbifolia Kunth
  pineland valerian

VERBENACEAE
Aloysia gratissima (Gillies & Hook.) Troncoso
  whitebrush
Aloysia gratissima var. schulziae (Standl.) L. Benson
  whitebrush
Aloysia wrightii Heller ex Abrams
  Wright's beebrush
Bouchea prismatica (L.) Kuntze
  prism bouchea
Duranta erecta L.
  golden dewdrops
Glandularia bipinnatifida (Nutt.) Nutt.
  Dakota mock vervain
Glandularia bipinnatifida var. bipinnatifida (Nutt.) Nutt.
  Dakota mock vervain
Glandularia chiricahensis Umber
  Chiricahua Mountain mock vervain
Glandularia elegans (Kunth) Umber
  mountain mock vervain
Glandularia gooddingii (Briq.) Solbrig
  southwestern mock vervain
Glandularia pulchella (Sweet) Troncoso
  South American mock vervain
Glandularia wrightii (Gray) Umber
  Davis Mountain mock vervain
Lantana achyranthifolia Desf.
  brushland shrubverbena
Lantana horrida sensu Moldenke, non Kunth
  = Lantana urticoides
Lantana urticoides Hayek
  West Indian shrubverbena
Lippia incisa (Small) Tidestrom
  = Phyla nodiflora
Lippia ligustrina of authors
  = Aloysia gratissima
Lippia nodiflora (L.) Michx.
  = Phyla nodiflora
Lippia wrightii Gray ex Torr.
  = Aloysia wrightii
Phyla cuneifolia (Torr.) Greene
  fogfruit
Phyla incisa Small
  = Phyla nodiflora
Phyla lanceolata (Michx.) Greene
  lanceleaf fogfruit
Phyla nodiflora (L.) Greene
  turkey tangle fogfruit
Tetraclea coulteri Gray
  Coulter's wrinklefruit
Verbena ambrosiifolia Rydb. ex Small
  = Glandularia bipinnatifida var. bipinnatifida
Verbena arizonica Briq.
  = Glandularia gooddingii
Verbena bipinnatifida Nutt.
  = Glandularia bipinnatifida var. bipinnatifida
Verbena bracteata Lag. & Rodr.
  bigbract verbena
Verbena carolina L.
  Carolina vervain
Verbena ciliata Benth.
  = Glandularia bipinnatifida var. bipinnatifida
Verbena gooddingii Briq.
  = Glandularia gooddingii
Verbena gracilis Desf.
  Fort Huachuca vervain
Verbena halei Small
  Texas vervain
Verbena hastata L.
  swamp verbena
Verbena hastata var. scabra Moldenke
  swamp verbena
Verbena hybrida Voss ex Rumpl.
  garden vervain
Verbena macdougalii Heller
  MacDougal verbena
Verbena menthifolia Benth.
  mint vervain
Verbena neomexicana (Gray) Small
  hillside vervain
Verbena perennis Woot.
  pinleaf vervain
Verbena pinetorum Moldenke
  Chihuahuan vervain
Verbena plicata Greene
  fanleaf vervain
Verbena scabra Vahl
  sandpaper vervain
Verbena stricta Vent.
  hoary verbena
Verbena tenuisecta Briq.
  = Glandularia pulchella
Verbena wrightii Gray
  = Glandularia wrightii
Vitex agnus-castus L.
  chastetree

VIOLACEAE
Hybanthus attenuatus (Humb. & Bonpl. ex J.A. Schultes) G.K. Schulze
  western greenviolet
Hybanthus verticillatus (Ortega) Baill.
  babyslippers
Viola adunca Sm.
  hookedspur violet
Viola affinis Le Conte
  sand violet
Viola bicolor Pursh
  field pansy
Viola canadensis L.
  Canadian white violet
Viola charlestonensis M.S. Baker & J.C. Clausen ex Clokey
  Charleston Mountain violet
Viola nephrophylla var. nephrophylla Greene
  northern bog violet
Viola nuttallii Pursh
  Nuttall's violet
Viola palustris L.
  marsh violet
Viola pedatifida G. Don
  prairie violet
Viola purpurea Kellogg
  goosefoot violet
Viola sororia Willd.
  common blue violet
Viola umbraticola Kunth
  Ponderosa violet

VISCACEAE
Arceuthobium abietinum Engelm. ex Munz
  fir dwarf mistletoe
Arceuthobium apachecum Hawksworth & Wiens
  Apache dwarf mistletoe
Arceuthobium blumeri A. Nels.
  southwestern white pine dwarf mistletoe
Arceuthobium cyanocarpum (A. Nels. ex Rydb.) A. Nels.
  limber pine dwarf mistletoe
Arceuthobium divaricatum Engelm.
  pinyon dwarf mistletoe
Arceuthobium douglasii Engelm.
  Douglas fir dwarf mistletoe
Arceuthobium gillii Hawksworth & Wiens
  Huachuca Mountain dwarf mistletoe
Arceuthobium microcarpum (Engelm.) Hawksworth & Wiens
  western spruce dwarf mistletoe
Arceuthobium vaginatum (Willd.) J. Presl
  pineland dwarf mistletoe
Phoradendron bolleanum (Seem.) Eichl.
  Bollean mistletoe
Phoradendron californicum Nutt.
  mesquite mistletoe
Phoradendron capitellatum Torr. ex Trel.
  downy mistletoe
Phoradendron densum Torr. ex Trel.
Phoradendron juniperinum Engelm.
  juniper mistletoe
Phoradendron macrophyllum (Engelm.) Cockerell
  Colorado Desert mistletoe
Phoradendron pauciflorum Torr.
Phoradendron tomentosum (DC.) Engelm. ex Gray
  Christmas mistletoe
Phoradendron villosum (Nutt.) Nutt.
  Pacific mistletoe

VITACEAE
Ampelopsis quinquefolia (L.) Michx.
  = Parthenocissus quinquefolia var. quinquefolia
Cissus incisa Des Moulins
  ivy treebine
Cissus trifoliata (L.) L.
  sorrelvine
Parthenocissus inserta (Kerner) Fritsch
  = Parthenocissus quinquefolia var. quinquefolia
Parthenocissus quinquefolia (L.) Planch.
  Virginia creeper
Parthenocissus quinquefolia var. quinquefolia (L.) Planch.
  Virginia creeper
Parthenocissus vitacea (Knerr) A.S. Hitchc.
  woodbine
Vitis arizonica Engelm.
  canyon grape
Vitis californica Benth.
  California wild grape
Vitis palmata Vahl
  catbird grape

ZANNICHELLIACEAE
Zannichellia palustris L.
  horned pondweed

ZYGOPHYLLACEAE
Covillea tridentata (Sesse & Moc. ex DC.) Vail
  = Larrea tridentata var. tridentata
Fagonia laevis Standl.
  California fagonbush
Fagonia pachyacantha Rydb.
  sticky fagonbush
Kallstroemia californica (S. Wats.) Vail
  California caltrop
Kallstroemia grandiflora Torr. ex Gray
  Arizona poppy
Kallstroemia hirsutissima Vail ex Small
  hairy caltrop
Kallstroemia parviflora J.B.S. Norton
  warty caltrop
Larrea divaricata auct. non Cav.
  = Larrea tridentata var. tridentata
Larrea glutinosa Engelm.
  = Larrea tridentata var. tridentata
Larrea mexicana Moric.
  = Larrea tridentata
Larrea tridentata (Sesse & Moc. ex DC.) Coville
  creosotebush, chaparral, gobernadora
Larrea tridentata var. tridentata (Sesse & Moc. ex DC.) Coville
  creosotebush
Peganum harmala L.
  Syrian rue
Tribulus terrestris L.
  puncturevine