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


ACERACEAE
Acer circinatum Pursh
  vine maple
Acer glabrum Torr.
  Rocky Mountain maple
Acer glabrum var. douglasii (Hook.) Dippel
  Douglas maple
Acer grandidentatum Nutt.
  bigtooth maple
Acer macrophyllum Pursh
  bigleaf maple
Acer negundo L.
  boxelder
Acer negundo var. negundo L.
  boxelder
Acer negundo var. violaceum (Kirchn.) Jaeger
  boxelder

ACORACEAE
Acorus americanus (Raf.) Raf.
  sweetflag

ALISMATACEAE
Alisma gramineum Lej.
  narrowleaf water plantain
Alisma plantago-aquatica L.
  American waterplantain
Alisma triviale Pursh
  northern water plantain
Baldellia ranunculoides (L.) Parl.
  lesser waterplantain
Machaerocarpus californicus (Torr. ex Benth.) Small
  California damsonium
Sagittaria latifolia Willd.
  broadleaf arrowhead
Sagittaria latifolia var. latifolia Willd.
  broadleaf arrowhead
Sagittaria subulata (L.) Buch.
  awlleaf arrowhead

AMARANTHACEAE
Amaranthus albus L.
  prostrate pigweed
Amaranthus blitoides S. Wats.
  mat amaranth
Amaranthus californicus (Moq.) S. Wats.
  California amaranth
Amaranthus cruentus L.
  red amaranth
Amaranthus hybridus L.
  slim amaranth
Amaranthus powellii S. Wats.
  Powell's amaranth
Amaranthus retroflexus L.
  redroot amaranth
Amaranthus rudis Sauer
  tall amaranth

ANACARDIACEAE
Rhus diversiloba Torr. & Gray
  = Toxicodendron diversilobum
Rhus glabra L.
  smooth sumac
Rhus radicans var. rydbergii (Small ex Rydb.) Rehd.
  = Toxicodendron rydbergii
Rhus toxicodendron var. vulgaris Michx.
  = Toxicodendron rydbergii
Toxicodendron diversilobum (Torr. & Gray) Greene
  Pacific poison oak
Toxicodendron rydbergii (Small ex Rydb.) Greene
  western poison ivy

APOCYNACEAE
Apocynum X floribundum Greene (pro sp.)
  intermediate dogbane
Apocynum androsaemifolium L.
  spreading dogbane
Apocynum androsaemifolium ssp. androsaemifolium L.
  spreading dogbane
Apocynum androsaemifolium ssp. androsaemifolium var. androsaemifolium L.
  spreading dogbane
Apocynum androsaemifolium ssp. androsaemifolium var. incanum A. DC.
  spreading dogbane
Apocynum androsaemifolium ssp. pumilum (Gray) Boivin
  spreading dogbane
Apocynum androsaemifolium ssp. pumilum var. pumilum Gray
  low dogbane
Apocynum cannabinum L.
  Indianhemp
Apocynum medium Greene
  = Apocynum X floribundum
Apocynum sibiricum Jacq.
  = Apocynum cannabinum
Apocynum suksdorfii Greene
  = Apocynum cannabinum
Vinca major L.
  bigleaf periwinkle

ARACEAE
Lysichiton americanus Hulten & St. John
  American skunkcabbage

ARALIACEAE
Aralia nudicaulis L.
  wild sarsaparilla
Echinopanax horridus (Sm.) Dcne. & Planch. ex H.A.T. Harms
  = Oplopanax horridus
Hedera helix L.
  English ivy
Oplopanax horridus Miq.
  devilsclub

ARISTOLOCHIACEAE
Asarum caudatum Lindl.
  British Columbia wildginger
Asarum caudatum var. caudatum Lindl.
  British Columbia wildginger

ASCLEPIADACEAE
Asclepias cryptoceras S. Wats.
  pallid milkweed
Asclepias cryptoceras ssp. davisii (Woods.) Woods.
  Davis' milkweed
Asclepias fascicularis Dcne.
  Mexican whorled milkweed
Asclepias speciosa Torr.
  showy milkweed

ASPLENIACEAE
Asplenium trichomanes L.
  maidenhair spleenwort
Asplenium trichomanes-ramosum L.
  brightgreen spleenwort

AZOLLACEAE
Azolla filiculoides Lam.
  Pacific azolla
Azolla mexicana Schlecht. & Cham. ex K. Presl
  Mexican azolla

BALSAMINACEAE
Impatiens aurella Rydb.
  paleyellow touchmenot
Impatiens capensis Meerb.
  jewelweed
Impatiens ecalcarata Blank.
  spurless touchmenot
Impatiens glandulifera Royle
  ornamental jewelweed
Impatiens noli-tangere L.
  western touchmenot

BERBERIDACEAE
Achlys triphylla (Sm.) DC.
  vanilla leaf
Berberis aquifolium Pursh
  = Mahonia aquifolium
Berberis nervosa Pursh
  = Mahonia nervosa var. nervosa
Berberis repens Lindl.
  = Mahonia repens
Berberis vulgaris L.
  common barberry
Mahonia aquifolium (Pursh) Nutt.
  Oregongrape
Mahonia nervosa (Pursh) Nutt.
  Cascade Oregongrape
Mahonia nervosa var. nervosa (Pursh) Nutt.
  cascade Oregongrape
Mahonia repens (Lindl.) G. Don
  creeping Oregongrape
Vancouveria hexandra (Hook.) Morr. & Dcne.
  white insideout flower

BETULACEAE
Alnus incana (L.) Moench
  mountain alder
Alnus incana ssp. tenuifolia (Nutt.) Breitung
  thinleaf alder
Alnus rhombifolia Nutt.
  white alder
Alnus rubra Bong.
  red alder
Alnus viridis (Vill.) Lam. & DC.
  sitka alder
Alnus viridis ssp. sinuata (Regel) A.& D. Love
  Sitka alder
Betula X utahensis Britt. (pro sp.)
  northwestern paper birch
Betula nana L.
  bog birch
Betula occidentalis Hook.
  water birch
Betula papyrifera Marsh.
  paper birch
Betula papyrifera var. commutata (Regel) Fern.
  western paper birch
Corylus cornuta Marsh.
  beaked hazelnut
Corylus cornuta var. californica (A. DC.) Sharp
  California hazelnut

BLECHNACEAE
Blechnum spicant (L.) Roth
  deer fern
Woodwardia chamissoi Brack.
  = Woodwardia fimbriata
Woodwardia fimbriata Sm.
  giant chainfern

BORAGINACEAE
Allocarya 
  = Plagiobothrys 
Amsinckia lycopsoides Lehm.
  tarweed fiddleneck
Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr.
  Menzies' fiddleneck
Amsinckia menziesii var. intermedia (Fisch & C.A. Mey.) Ganders
Amsinckia menziesii var. menziesii (Lehm.) A. Nels. & J.F. Macbr.
Amsinckia spectabilis Fisch. & C.A. Mey.
  woolly breeches
Amsinckia tessellata Gray
  bristly fiddleneck
Anchusa arvensis (L.) Bieb.
  small bugloss
Anchusa azurea P. Mill.
  Italian bugloss
Anchusa officinalis L.
  common bugloss
Asperugo procumbens L.
  madwort
Buglossoides arvensis (L.) I.M. Johnston
  corn gromwell
Cryptantha Lehm. ex G. Don
  cryptantha
Cryptantha affinis (Gray) Greene
  quill catseye
Cryptantha ambigua (Gray) Greene
  basin catseye
Cryptantha celosioides (Eastw.) Payson
  buttecandle
Cryptantha circumscissa (Hook. & Arn.) I.M. Johnston
  cushion catseye
Cryptantha circumscissa var. circumscissa (Hook. & Arn.) I.M. Johnston
  cushion catseye
Cryptantha fendleri (Gray) Greene
  sanddune catseye
Cryptantha flaccida (Dougl. ex Lehm.) Greene
  weakstem catseye
Cryptantha intermedia (Gray) Greene
  Clearwater catseye
Cryptantha interrupta (Greene) Payson
  Elko catseye
Cryptantha leucophaea (Dougl. ex Lehm.) Payson
  gray catseye
Cryptantha pterocarya (Torr.) Greene
  wingnut catseye
Cryptantha pterocarya var. pterocarya (Torr.) Greene
  wingnut catseye
Cryptantha rostellata var. rostellata (Greene) Greene
  beaked catseye
Cryptantha scoparia A. Nels.
  Pinyon Desert catseye
Cryptantha simulans Greene
  pinewoods catseye
Cryptantha spiculifera (Piper) Payson
  Snake River catseye
Cryptantha thompsonii I.M. Johnston
  Thompson's catseye
Cryptantha torreyana (Gray) Greene
  Torrey's catseye
Cryptantha torreyana var. torreyana (Gray) Greene
  Torrey's catseye
Cryptantha watsonii (Gray) Greene
  Watson's catseye
Cynoglossum grande Dougl. ex Lehm.
  Pacific hound's tongue
Cynoglossum officinale L.
  gypsyflower
Echium vulgare L.
  common vipersbugloss
Eritrichium nanum (Vill.) Schrad. ex Gaudin
  arctic alpine forget me not
Eritrichium nanum var. elongatum (Rydb.) Cronq.
  arctic alpine forget me not
Hackelia ciliata (Dougl. ex Lehm.) I.M. Johnston
  Okanogan stickseed
Hackelia cinerea (Piper) I.M. Johnston
  gray stickseed
Hackelia deflexa (Wahlenb.) Opiz
  nodding stickseed
Hackelia deflexa var. americana (Gray) Fern. & I.M. Johnston
  American stickseed
Hackelia diffusa (Lehm.) I.M. Johnston
  spreading stickseed
Hackelia diffusa var. arida (Piper) R.L. Carr
  sagebrush stickseed
Hackelia diffusa var. cottonii (Piper) R.L. Carr
  Cotton's stickseed
Hackelia diffusa var. diffusa (Lehm.) I.M. Johnston
  spreading stickseed
Hackelia floribunda (Lehm.) I.M. Johnston
  manyflower stickseed
Hackelia hispida (Gray) I.M. Johnston
  showy stickseed
Hackelia hispida var. disjuncta R.L. Carr
  rough stickseed
Hackelia micrantha (Eastw.) J.L. Gentry
  Jessica sticktight
Hackelia venusta (Piper) St. John
  lesser showy stickseed
Heliotropium curassavicum L.
  salt heliotrope
Heliotropium curassavicum var. obovatum DC.
  seaside heliotrope
Lappula occidentalis (S. Wats.) Greene
  flatspine stickseed
Lappula occidentalis var. cupulata (Gray) Higgins
  flatspine stickseed
Lappula occidentalis var. occidentalis (S. Wats.) Greene
  desert stickseed
Lappula squarrosa (Retz.) Dumort.
  European stickseed
Lithospermum arvense L.
  = Buglossoides arvensis
Lithospermum ruderale Dougl. ex Lehm.
  western gromwell
Mertensia longiflora Greene
  small bluebells
Mertensia oblongifolia (Nutt.) G. Don
  oblongleaf bluebells
Mertensia paniculata (Ait.) G. Don
  tall bluebells
Mertensia paniculata var. borealis (J.F. Macbr.) L.O. Williams
  northern bluebells
Mertensia paniculata var. paniculata (Ait.) G. Don
  tall bluebells
Mertensia platyphylla Heller
  broadleaf bluebells
Mertensia platyphylla var. platyphylla Heller
  broadleaf bluebells
Mertensia platyphylla var. subcordata (Greene) L.O. Williams
  broadleaf bluebells
Mertensia umbratilis Greenm.
  shade bluebells
Myosotis arvensis (L.) Hill
  field forget me not
Myosotis azorica H.C. Wats. ex Hook.
  Azores forget me not
Myosotis discolor Pers.
  changing forget me not
Myosotis laxa Lehm.
  bay forget me not
Myosotis scorpioides L.
  true forget me not
Myosotis stricta Link ex Roemer & J.A. Schultes
  strict forget me not
Myosotis sylvatica Ehrh. ex Hoffmann
  woodland forget me not
Myosotis verna Nutt.
  spring forget me not
Pectocarya penicillata (Hook. & Arn.) A. DC.
  sleeping combseed
Pectocarya pusilla (A. DC.) Gray
  little combseed
Pectocarya setosa Gray
  moth combseed
Plagiobothrys figuratus (Piper) I.M. Johnston ex M.E. Peck
  fragrant popcornflower
Plagiobothrys figuratus ssp. figuratus (Piper) I.M. Johnston ex M.E. Peck
  fragrant popcornflower
Plagiobothrys leptocladus (Greene) I.M. Johnston
  finebranched popcornflower
Plagiobothrys nothofulvus (Gray) Gray
  rusty popcornflower
Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnston
  Scouler's popcornflower
Plagiobothrys scouleri var. cusickii (Greene) Higgins
  Cusick's popcornflower
Plagiobothrys scouleri var. scouleri (Hook. & Arn.) I.M. Johnston
  Scouler's popcornflower
Plagiobothrys tenellus (Nutt. ex Hook.) Gray
  Pacific popcornflower
Symphytum asperum Lepechin
  prickly comfrey
Symphytum officinale L.
  common comfrey
Tiquilia nuttallii (Hook.) A. Richards.
  Nuttall's coldenia

BUDDLEJACEAE
Buddleja davidii Franch.
  orange eye butterflybush

CABOMBACEAE
Brasenia schreberi J.F. Gmel.
  watershield

CACTACEAE
Opuntia erinacea Engelm. & Bigelow ex Engelm.
  grizzlybear pricklypear
Opuntia erinacea var. columbiana (Griffiths) L. Benson
  grizzleybear pricklypear
Opuntia fragilis (Nutt.) Haw.
  brittle pricklypear
Opuntia fragilis var. fragilis (Nutt.) Haw.
  pygmy pricklypear
Opuntia polyacantha Haw.
  plains pricklypear
Pediocactus simpsonii (Engelm.) Britt. & Rose
  Simpson hedgehog cactus
Pediocactus simpsonii var. robustior (Coult.) L. Benson
  snowball cactus

CALLITRICHACEAE
Callitriche hermaphroditica L.
  northern waterstarwort
Callitriche heterophylla Pursh
  larger waterstarwort
Callitriche heterophylla ssp. bolanderi (Hegelm.) Calder & Taylor
  Bolander's waterstarwort
Callitriche heterophylla ssp. heterophylla Pursh
  twoheaded waterstarwort
Callitriche palustris L.
  vernal waterstarwort
Callitriche stagnalis Scop.
  pond waterstarwort

CAMPANULACEAE
Campanula aparinoides Pursh
  marsh bellflower
Campanula lasiocarpa Cham.
  mountain harebell
Campanula parryi Gray
  Parry's bellflower
Campanula parryi var. idahoensis McVaugh
  Idaho bellflower
Campanula piperi T.J. Howell
  Olympic bellflower
Campanula rotundifolia L.
  bluebell bellflower
Campanula scabrella Engelm.
  rough bellflower
Campanula scouleri Hook. ex A. DC.
  pale bellflower
Downingia elegans (Dougl. ex Lindl.) Torr.
  elegant calicoflower
Downingia elegans var. brachypetala (Gandog.) McVaugh
  elegant calicoflower
Downingia elegans var. elegans (Dougl. ex Lindl.) Torr.
  elegant calicoflower
Downingia yina Applegate
  cascade calicoflower
Githopsis specularioides Nutt.
  common bluecup
Heterocodon rariflorum Nutt.
  rareflower heterocodon
Howellia aquatilis Gray
  water howellia
Lobelia dortmanna L.
  Dortmann's cardinalflower
Lobelia kalmii L.
  Ontario lobelia
Triodanis perfoliata (L.) Nieuwl.
  clasping Venus' lookingglass
Triodanis perfoliata var. perfoliata (L.) Nieuwl.
  clasping Venus' lookingglass

CANNABACEAE
Cannabis sativa L.
  marijuana
Humulus lupulus L.
  common hop

CAPPARACEAE
Cleome lutea Hook.
  yellow spiderflower
Cleome lutea var. lutea Hook.
  yellow spiderflower
Cleome serrulata Pursh
  Rocky Mountain beeplant
Polanisia dodecandra (L.) DC.
  roughseed clammyweed
Polanisia dodecandra ssp. trachysperma (Torr. & Gray) Iltis
  sandyseed clammyweed

CAPRIFOLIACEAE
Linnaea borealis L.
  twinflower
Linnaea borealis ssp. longiflora (Torr.) Hulten
  longtube twinflower
Lonicera caerulea L.
  sweetberry honeysuckle
Lonicera caerulea var. cauriana (Fern.) Boivin
  bluefly honeysuckle
Lonicera ciliosa (Pursh) Poir. ex DC.
  orange honeysuckle
Lonicera conjugialis Kellogg
  purpleflower honeysuckle
Lonicera etrusca Santi
  Etruscan honeysuckle
Lonicera hispidula (Lindl.) Dougl. ex Torr. & Gray
  California honeysuckle
Lonicera involucrata Banks ex Spreng.
  twinberry honeysuckle
Lonicera involucrata var. involucrata Banks ex Spreng.
  twinberry honeysuckle
Lonicera utahensis S. Wats.
  Utah honeysuckle
Sambucus cerulea var. cerulea Raf.
  blue elderberry
Sambucus mexicana ssp. cerulea (Raf.) E. Murr.
  = Sambucus nigra ssp. cerulea
Sambucus nigra L.
  European black elder
Sambucus nigra ssp. cerulea (Raf.) R. Bolli
Sambucus racemosa L.
  scarlet elderberry
Sambucus racemosa ssp. pubens var. arborescens (Torr. & Gray) Gray
  Pacific red elder
Sambucus racemosa ssp. pubens var. melanocarpa (Gray) McMinn
  black elderberry
Sambucus racemosa var. racemosa L.
Symphoricarpos albus (L.) Blake
  common snowberry
Symphoricarpos albus var. laevigatus (Fern.) Blake
  common snowberry
Symphoricarpos hesperius G.N. Jones
  trailing snowberry
Symphoricarpos occidentalis Hook.
  western snowberry
Symphoricarpos oreophilus Gray
  whortleleaf snowberry
Symphoricarpos oreophilus var. utahensis (Rydb.) A. Nels.
  Utah snowberry
Viburnum edule (Michx.) Raf.
  mooseberry viburnum
Viburnum ellipticum Hook.
  common viburnum
Viburnum opulus L.
  European cranberrybush viburnum
Viburnum opulus var. americanum Ait.
  American cranberry viburnum

CARYOPHYLLACEAE
Agrostemma githago L.
  common corncockle
Arenaria aculeata S. Wats.
  prickly sandwort
Arenaria capillaris Poir.
  mountain sandwort
Arenaria capillaris ssp. americana Maguire
  fescue sandwort
Arenaria congesta Nutt.
  ballhead sandwort
Arenaria congesta var. cephaloidea (Rydb.) Maguire
  sharptip sandwort
Arenaria congesta var. congesta Nutt.
  ballhead sandwort
Arenaria congesta var. glandulifera Maguire
  gland sandwort
Arenaria congesta var. prolifera Maguire
  ballhead sandwort
Arenaria franklinii Dougl. ex Hook.
  Franklin's sandwort
Arenaria franklinii var. franklinii Dougl. ex Hook.
  Franklin's sandwort
Arenaria franklinii var. thompsonii M.E. Peck
  Thompson's sandwort
Arenaria serpyllifolia L.
  thymeleaf sandwort
Cardionema ramosissimum (Weinm.) A. Nels. & J.F. Macbr.
  sandcarpet
Cerastium arvense L.
  field chickweed
Cerastium arvense ssp. strictum (L.) Ugborogho
  field chickweed
Cerastium beeringianum Cham. & Schlecht.
  Bering chickweed
Cerastium dubium (Bast.) Guepin
  doubtful chickweed
Cerastium fontanum Baumg.
  common chickweed
Cerastium fontanum ssp. vulgare (Hartman) Greuter & Burdet
  big chickweed
Cerastium glomeratum Thuill.
  sticky chickweed
Cerastium nutans Raf.
  nodding chickweed
Cerastium siculum Guss.
  dry chickweed
Dianthus armeria L.
  Deptford pink
Dianthus barbatus L.
  sweetwilliam
Dianthus deltoides L.
  maiden pink
Gypsophila paniculata L.
  babysbreath gypsophila
Holosteum umbellatum L.
  jagged chickweed
Honckenya peploides (L.) Ehrh.
  seaside sandplant
Honckenya peploides ssp. major (Hook.) Hulten
  seaside sandplant
Lepyrodiclis holosteoides (C.A. Mey.) Fenzl ex Fisch. & C.A. Mey.
  lepyrodiclis
Lychnis coronaria (L.) Desr.
  rose campion
Minuartia michauxii (Fenzl) Farw.
  Michaux's stitchwort
Minuartia michauxii var. michauxii (Fenzl) Farw.
  Michaux's stitchwort
Minuartia nuttallii (Pax) Briq.
  Nuttall's sandwort
Minuartia nuttallii ssp. nuttallii (Pax) Briq.
  Nuttall's sandwort
Minuartia obtusiloba (Rydb.) House
  twinflower sandwort
Minuartia pusilla (S. Wats.) Mattf.
  annual sandwort
Minuartia pusilla var. pusilla (S. Wats.) Mattf.
  annual sandwort
Minuartia rossii (R. Br. ex Richards.) Graebn.
  Ross' sandwort
Minuartia rubella (Wahlenb.) Hiern
  beautiful sandwort
Minuartia tenella (Nutt.) Mattf.
  slender stitchwort
Moehringia lateriflora (L.) Fenzl
  bluntleaf sandwort
Moehringia macrophylla (Hook.) Fenzl
  largeleaf sandwort
Pseudostellaria jamesiana (Torr.) W.A. Weber & R.L. Hartman
  tuber starwort
Sagina apetala Ard.
  annual pearlwort
Sagina decumbens (Ell.) Torr. & Gray
  beach pearlwort
Sagina decumbens ssp. occidentalis (S. Wats.) Crow
  western pearlwort
Sagina maxima Gray
  stickystem pearlwort
Sagina maxima ssp. crassicaulis (S. Wats.) Crow
  stickystem pearlwort
Sagina maxima ssp. maxima Gray
  stickystem pearlwort
Sagina procumbens L.
  birdeye pearlwort
Sagina saginoides (L.) Karst.
  arctic pearlwort
Saponaria officinalis L.
  bouncingbet
Scleranthus annuus L.
  German knotgrass
Silene acaulis (L.) Jacq.
  moss campion
Silene acaulis var. exscapa (All.) DC.
  moss campion
Silene antirrhina L.
  sleepy silene
Silene armeria L.
  sweet William silene
Silene conica L.
  striped corn catchfly
Silene conoidea L.
  weed silene
Silene dichotoma Ehrh.
  dichotoma silene
Silene dioica (L.) Clairville
  red catchfly
Silene douglasii Hook.
  Douglas's campion
Silene douglasii var. douglasii Hook.
  Douglas's campion
Silene gallica L.
  common catchfly
Silene latifolia Poir.
  bladder campion
Silene latifolia ssp. alba (P. Mill.) Greuter & Burdet
  bladder campion
Silene menziesii Hook.
  Menzies' campion
Silene menziesii ssp. menziesii Hook.
  Menzies' campion
Silene menziesii ssp. menziesii var. menziesii Hook.
  Menzies' campion
Silene menziesii ssp. menziesii var. viscosa (Greene) C.L. Hitchc. & Maguire
  Menzies' campion
Silene multinervia S. Wats.
  manynerve catchfly
Silene noctiflora L.
  nightflowering silene
Silene oregana S. Wats.
  Oregon silene
Silene parryi (S. Wats.) C.L. Hitchc. & Maguire
  Parry's silene
Silene scouleri Hook.
  Scouler's campion
Silene scouleri ssp. scouleri Hook.
  Scouler's campion
Silene scouleri ssp. scouleri var. pacifica (Eastw.) C.L. Hitchc.
  Scouler's campion
Silene scouleri ssp. scouleri var. scouleri Hook.
  Scouler's campion
Silene seelyi Morton & J.W. Thompson
  Seely's catchfly
Silene spaldingii S. Wats.
  Spalding's silene
Silene suksdorfii B.L. Robins.
  Suksdorf's silene
Silene vulgaris (Moench) Garcke
  maidenstears
Spergula arvense L.
  corn spurry
Spergula arvense var. sativum (Boenn.) Mert. & Koch
  corn spurry
Spergularia canadensis (Pers.) G. Don
  Canadian sandspurry
Spergularia canadensis var. occidentalis R.P. Rossb.
  western sandspurry
Spergularia diandra (Guss.) Held. & Sart.
  diandra sandspurry
Spergularia macrotheca (Hornem.) Heynh.
  sticky sandspurry
Spergularia rubra (L.) J.& K. Presl
  red sandspurry
Spergularia salina J.& K. Presl
  salt sandspurry
Spergularia salina var. salina J.& K. Presl
  salt sandspurry
Stellaria borealis Bigelow
  boreal starwort
Stellaria borealis ssp. borealis Bigelow
  boreal starwort
Stellaria borealis ssp. sitchana (Steud.) Piper
  Sitka starwort
Stellaria calycantha (Ledeb.) Bong.
  northern starwort
Stellaria crispa Cham. & Schlecht.
  curled starwort
Stellaria graminea L.
  grasslike starwort
Stellaria graminea var. graminea L.
  grasslike starwort
Stellaria humifusa Rottb.
  saltmarsh starwort
Stellaria jamesiana Torr.
  = Pseudostellaria jamesiana
Stellaria longifolia Muhl. ex Willd.
  longleaf starwort
Stellaria longifolia var. longifolia Muhl. ex Willd.
  longleaf starwort
Stellaria longipes Goldie
  longstalk starwort
Stellaria longipes ssp. longipes Goldie
  longstalk starwort
Stellaria longipes var. longipes Goldie
  longstalk starwort
Stellaria media (L.) Vill.
  common chickweed
Stellaria nitens Nutt.
  shiny chickweed
Stellaria obtusa Engelm.
  Rocky Mountain chickweed
Vaccaria hispanica (P. Mill.) Rauschert
  cow soapwort

CELASTRACEAE
Euonymus occidentalis Nutt. ex Torr.
  western wahoo
Euonymus occidentalis var. occidentalis Nutt. ex Torr.
  western wahoo
Paxistima myrsinites (Pursh) Raf.
  boxleaf myrtle

CERATOPHYLLACEAE
Ceratophyllum echinatum Gray
  spineless hornwort

CHENOPODIACEAE
Atriplex canescens (Pursh) Nutt.
  fourwing saltbush
Atriplex canescens var. canescens (Pursh) Nutt.
  fourwing saltbush
Atriplex falcata (M.E. Jones) Standl.
  sickle saltbush
Atriplex gmelinii C.A. Mey. ex Bong.
  Gmelin's saltbush
Atriplex littoralis L.
  grassleaf orache
Atriplex micrantha Ledeb.
  twoscale saltbush
Atriplex oblongifolia Waldst. & Kit.
  oblongleaf orache
Atriplex patula L.
  spear saltbush
Atriplex patula ssp. patula L.
  spear saltbush
Atriplex prostrata Boucher ex DC.
  triangle orache
Atriplex rosea L.
  tumbling saltweed
Atriplex spinosa (Hook.) Collotzi
  = Grayia spinosa
Atriplex subspicata (Nutt.) Rydb.
  saline saltbush
Atriplex truncata (Torr. ex S. Wats.) Gray
  wedgescale saltbush
Bassia hyssopifolia (Pallas) Kuntz
  fivehorn smotherweed
Chenopodium album L.
  lambsquarters
Chenopodium ambrosioides L.
  Mexican tea
Chenopodium atrovirens Rydb.
  pinyon goosefoot
Chenopodium berlandieri Moq.
  pitseed goosefoot
Chenopodium berlandieri var. zschackii (J. Murr) J. Murr ex Aschers.
  Zschack's goosefoot
Chenopodium botrys L.
  Jerusalem oak goosefoot
Chenopodium capitatum (L.) Ambrosi
  blite goosefoot
Chenopodium capitatum var. capitatum (L.) Aschers.
  strawberry spinach
Chenopodium chenopodioides (L.) Aellen
Chenopodium desiccatum A. Nels.
  aridland goosefoot
Chenopodium foliosum (Moench) Aschers.
  leafy goosefoot
Chenopodium fremontii S. Wats.
  Fremont's goosefoot
Chenopodium fremontii var. fremontii S. Wats.
  Fremont's goosefoot
Chenopodium glaucum L.
  oakleaf goosefoot
Chenopodium hians Standl.
  hians goosefoot
Chenopodium humile Hook.
  marshland goosefoot
Chenopodium leptophyllum (Moq.) Nutt. ex S. Wats.
  narrowleaf goosefoot
Chenopodium murale L.
  nettleleaf goosefoot
Chenopodium pratericola Rydb.
  desert goosefoot
Chenopodium pumilio R. Br.
  clammy goosefoot
Chenopodium rubrum L.
  red goosefoot
Chenopodium simplex (Torr.) Raf.
  mapleleaf goosefoot
Chenopodium strictum Roth
  lateflowering goosefoot
Chenopodium strictum ssp. glaucophyllum (Aellen) Aellen & Just.
  lateflowering goosefoot
Chenopodium subglabrum (S. Wats.) A. Nels.
  smooth goosefoot
Chenopodium urbicum L.
  city goosefoot
Corispermum hyssopifolium L.
  common bugseed
Eurotia lanata (Pursh) Moq.
  = Krascheninnikovia lanata
Grayia spinosa (Hook.) Moq.
  spiny hopsage
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
Salicornia maritima Wolff & Jefferies
  slender grasswort
Salicornia rubra A. Nels.
  red swampfire
Salicornia virginica L.
  Virginia glasswort
Salsola kali L.
  prickly Russian thistle
Sarcobatus vermiculatus (Hook.) Torr.
  greasewood
Sarcocornia perennis (P. Mill.) A.J. Scott
  chickenclaws
Spinacia oleracea L.
  spinach
Suaeda calceoliformis (Hook.) Moq.
  Pursh seepweed
Suaeda maritima (L.) Dumort.
  herbaceous seepweed
Suaeda maritima ssp. maritima (L.) Dumort.
  herbaceous seepweed

CLUSIACEAE
Hypericum anagalloides Cham. & Schlecht.
  trailing St. Johnswort
Hypericum formosum ssp. scouleri (Hook.) C.L. Hitchc.
  = Hypericum scouleri ssp. scouleri
Hypericum majus (Gray) Britt.
  large St. Johnswort
Hypericum perforatum L.
  common St. Johnswort
Hypericum scouleri Hook.
  Scouler's St. Johnswort
Hypericum scouleri ssp. nortoniae (M.E. Jones) J. Gillett
  Norton's St. Johnswort
Hypericum scouleri ssp. scouleri Hook.
  Scouler's St. Johnswort

COMPOSITAE
Achillea lanulosa Nutt.
  = Achillea millefolium var. occidentalis
Achillea millefolium L.
  common yarrow
Achillea millefolium var. alpicola (Rydb.) Garrett
  common yarrow
Achillea millefolium var. californica (Pollard) Jepson
  California yarrow
Achillea millefolium var. millefolium L.
  common yarrow
Achillea millefolium var. occidentalis DC.
  western yarrow
Achillea millefolium var. pacifica (Rydb.) G.N. Jones
  Pacific yarrow
Acroptilon repens (L.) DC.
  hardheads
Adenocaulon bicolor Hook.
  American trailplant
Ageratina occidentalis (Hook.) King & H.E. Robins.
  western snakeroot
Agoseris apargioides (Less.) Greene
  woolly goat chicory
Agoseris apargioides var. maritima (Sheldon) Q. Jones
Agoseris aurantiaca (Hook.) Greene
  orange agoseris
Agoseris aurantiaca var. aurantiaca (Hook.) Greene
  orange agoseris
Agoseris elata (Nutt.) Greene
  tall agoseris
Agoseris glauca (Pursh) Raf.
  pale agoseris
Agoseris glauca var. agrestis (Osterhout) Q. Jones ex Cronq.
  pale agoseris
Agoseris glauca var. dasycephala (Torr. & Gray) Jepson
  pale agoseris
Agoseris glauca var. glauca (Pursh) Raf.
  pale agoseris
Agoseris glauca var. monticola (Greene) Q. Jones ex Cronq.
  pale agoseris
Agoseris grandiflora (Nutt.) Greene
  bigflower agoseris
Agoseris heterophylla (Nutt.) Greene
  annual agoseris
Agoseris heterophylla var. heterophylla (Nutt.) Greene
  annual agoseris
Agoseris retrorsa (Benth.) Greene
  spearleaf agoseris
Ambrosia acanthicarpa Hook.
  flatspine burr ragweed
Ambrosia artemisiifolia L.
  annual ragweed
Ambrosia artemisiifolia var. elatior (L.) Descourtils
  annual ragweed
Ambrosia chamissonis (Less.) Greene
  silver burr ragweed
Ambrosia psilostachya DC.
  Cuman ragweed
Ambrosia trifida L.
  great ragweed
Ambrosia trifida var. trifida L.
  great ragweed
Anaphalis margaritacea (L.) Benth. & Hook. f.
  western pearlyeverlasting
Antennaria anaphaloides Rydb.
  pearly pussytoes
Antennaria dimorpha (Nutt.) Torr. & Gray
  low pussytoes
Antennaria flagellaris (Gray) Gray
  whip pussytoes
Antennaria geyeri Gray
  pinewoods pussytoes
Antennaria howellii Greene
  Howell's pussytoes
Antennaria howellii ssp. howellii Greene
  Howell's pussytoes
Antennaria lanata (Hook.) Greene
  woolly pussytoes
Antennaria luzuloides Torr. & Gray
  rush pussytoes
Antennaria media Greene
  Rocky Mountain pussytoes
Antennaria microphylla Rydb.
  littleleaf pussytoes
Antennaria parvifolia Nutt.
  smallleaf pussytoes
Antennaria pulcherrima (Hook.) Greene
  showy pussytoes
Antennaria racemosa Hook.
  raceme pussytoes
Antennaria rosea Greene
  rosy pussytoes
Antennaria rosea ssp. arida (E. Nels.) Bayer
  rosy pussytoes
Antennaria rosea ssp. confinis (Greene) Bayer
  rosy pussytoes
Antennaria rosea ssp. pulvinata (Greene) Bayer
  pulvinate pussytoes
Antennaria rosea ssp. rosea Greene
  rosy pussytoes
Antennaria stenophylla (Gray) Gray
  narrowleaf pussytoes
Antennaria umbrinella Rydb.
  umber pussytoes
Anthemis arvensis L.
  corn chamomile
Anthemis cotula L.
  stinking chamomile
Anthemis tinctoria L.
  golden chamomile
Arctium lappa L.
  greater burrdock
Arctium minus Bernh.
  lesser burrdock
Arnica X diversifolia Greene (pro sp.)
  rayless arnica
Arnica amplexicaulis Nutt.
  clasping arnica
Arnica chamissonis Less.
  chamisso arnica
Arnica chamissonis ssp. chamissonis Less.
  chamisso arnica
Arnica chamissonis ssp. chamissonis var. interior Maguire
  chamisso arnica
Arnica chamissonis ssp. foliosa (Nutt.) Maguire
  chamisso arnica
Arnica chamissonis ssp. foliosa var. andina (Nutt.) Ediger & Barkl.
  chamisso arnica
Arnica chamissonis ssp. foliosa var. incana (Gray) Hulten
  chamisso arnica
Arnica cordifolia Hook.
  heartleaf arnica
Arnica discoidea Benth.
  rayless arnica
Arnica fulgens Pursh
  foothill arnica
Arnica gracilis Rydb.
  smallhead arnica
Arnica latifolia Bong.
  broadleaf arnica
Arnica longifolia D.C. Eat.
  spearleaf arnica
Arnica mollis Hook.
  hairy arnica
Arnica nevadensis Gray
  Nevada arnica
Arnica parryi Gray
  Parry's arnica
Arnica parryi ssp. parryi Gray
  Parry's arnica
Arnica rydbergii Greene
  Rydberg's arnica
Arnica sororia Greene
  twin arnica
Artemisia absinthium L.
  European wormwood
Artemisia arbuscula Nutt.
  low sagebrush
Artemisia arbuscula ssp. arbuscula Nutt.
  gray low sagebrush
Artemisia arctica Less.
  boreal sagebrush
Artemisia arctica ssp. arctica Less.
  boreal sagebrush
Artemisia biennis Willd.
  biennial wormwood
Artemisia campestris L.
  field sagewort
Artemisia campestris ssp. borealis (Pallas) Hall & Clements
  northern sagewort
Artemisia campestris ssp. borealis var. borealis (Pallas) M.E. Peck
  Pacific wormwood
Artemisia campestris ssp. borealis var. purshii (Hook.) Cronq.
  Pursh's wormwood
Artemisia campestris ssp. borealis var. scouleriana (Hook.) Cronq.
  Scouler's wormwood
Artemisia campestris ssp. borealis var. wormskioldii (Bess. ex Hook.) Cronq.
  Wormskiold's wormwood
Artemisia campestris ssp. caudata (Michx.) Hall & Clements
  field wormwood
Artemisia campestris ssp. pacifica (Nutt.) Hall & Clements
  Pacific wormwood
Artemisia douglasiana Bess.
  California mugwort
Artemisia dracunculus L.
  Russian or false tarragon
Artemisia dracunculus ssp. dracunculus L.
  Russian or false tarragon
Artemisia frigida Willd.
  fringed sagewort, silver sage
Artemisia furcata Bieb.
  forked sagewort
Artemisia furcata var. furcata Bieb.
  forked sagewort
Artemisia lindleyana Bess.
  northwest sagebrush
Artemisia ludoviciana Nutt.
  estafiate
Artemisia ludoviciana ssp. candicans (Rydb.) Keck
  estafiate
Artemisia ludoviciana ssp. ludoviciana Nutt.
  estafiate
Artemisia michauxiana Bess.
  Michaux's sagebrush
Artemisia rigida (Nutt.) Gray
  stiff sagebrush
Artemisia suksdorfii Piper
  coastal wormwood
Artemisia tilesii Ledeb.
  Tilesius' wormwood
Artemisia tilesii ssp. elatior (Torr. & Gray) Hulten
  Tilesius' wormwood
Artemisia tridentata Nutt.
  big sagebrush
Artemisia tridentata ssp. tridentata Nutt.
  basin big sagebrush
Artemisia tridentata ssp. vaseyana (Rydb.) Beetle
  mountain big sagebrush
Artemisia tripartita Rydb.
  threetip sagebrush
Artemisia tripartita ssp. tripartita Rydb.
  Idaho threetip sagebrush
Aster X amethystinus Nutt. (pro sp.)
  amethyst aster
Aster X columbianus Piper (pro sp.)
  Columbian aster
Aster alpigenus ssp. alpigenus (Torr. & Gray) Gray
  tundra aster
Aster ascendens Lindl.
  Chile aster
Aster campestris Nutt.
  meadow aster
Aster campestris var. bloomeri (Gray) Gray
  Bloomer's aster
Aster campestris var. campestris Nutt.
  western meadow aster
Aster chilensis Nees
  creeping aster
Aster chilensis var. chilensis Nees
  creeping aster
Aster conspicuus Lindl.
  showy aster
Aster cusickii Gray
  Cusick's aster
Aster eatonii (Gray) T.J. Howell
  Eaton's aster
Aster ericoides L.
  heath aster
Aster ericoides var. pansus (Blake) Boivin
  manyflowered aster
Aster falcatus Lindl.
  cluster aster
Aster foliaceus Lindl. ex DC.
  alpine leafybract aster
Aster foliaceus var. apricus Gray
  leafybract aster
Aster foliaceus var. canbyi Gray
  Canby's aster
Aster foliaceus var. foliaceus Lindl. ex DC.
  alpine leafybract aster
Aster foliaceus var. parryi (D.C. Eat.) Gray
  Parry's aster
Aster hallii Gray
  Hall's aster
Aster hendersonii Fern.
  Lyall aster
Aster integrifolius Nutt.
  thickstem aster
Aster jessicae Piper
  Jessica's aster
Aster laevis L.
  smooth aster
Aster laevis var. geyeri Gray
  Geyer's smooth aster
Aster ledophyllus (Gray) Gray
  Cascade aster
Aster ledophyllus var. ledophyllus (Gray) Gray
  Cascade aster
Aster meritus A. Nels.
Aster novae-angliae L.
  New England aster
Aster occidentalis (Nutt.) Torr. & Gray
  western aster
Aster occidentalis var. intermedius Gray
  intermediate aster
Aster occidentalis var. occidentalis (Nutt.) Torr. & Gray
  western aster
Aster oregonensis ssp. oregonensis (Nutt.) Cronq.
  Oregon aster
Aster radulinus Gray
  roughleaf aster
Aster sibiricus L.
  Siberian aster
Aster subspicatus Nees
  Douglas aster
Aster subspicatus var. grayi (Suksdorf) Cronq.
  Gray's aster
Aster subspicatus var. subspicatus Nees
  leafybract aster
Balsamita major Desf.
  costmary
Balsamorhiza X terebinthacea (Hook.) Nutt. (pro sp.)
  balsamroot
Balsamorhiza X tomentosa Rydb. (pro sp.)
  tomentose balsamroot
Balsamorhiza careyana Gray
  Carey's balsamroot
Balsamorhiza careyana var. careyana Gray
  Carey's balsamroot
Balsamorhiza deltoidea Nutt.
  deltoid balsamroot
Balsamorhiza hookeri (Hook.) Nutt.
  Hooker's balsamroot
Balsamorhiza hookeri var. hirsuta (Nutt.) A. Nels.
  hairy balsamroot
Balsamorhiza hookeri var. hookeri (Hook.) Nutt.
  Hooker's balsamroot
Balsamorhiza hookeri var. lagocephala (Sharp) Cronq.
  rabbithead balsamroot
Balsamorhiza incana Nutt.
  hoary balsamroot
Balsamorhiza rosea A. Nels. & J.F. Macbr.
  rosy balsamroot
Balsamorhiza sagittata (Pursh) Nutt.
  arrowleaf balsamroot
Balsamorhiza serrata A. Nels. & J.F. Macbr.
  serrate balsamroot
Bellis perennis L.
  lawndaisy
Bidens cernua L.
  nodding beggartick
Bidens frondosa L.
  devil's beggartick
Bidens tripartita L.
  threelobe beggarticks
Bidens vulgata Greene
  big devils beggartick
Blepharipappus scaber Hook.
  rough eyelashweed
Blepharipappus scaber ssp. scaber Hook.
  rough eyelashweed
Brachyactis ciliata (Ledeb.) Ledeb.
  alkali rayless aster
Brachyactis ciliata ssp. angusta (Lindl.) A.G. Jones
  alkali rayless aster
Brachyactis frondosa (Nutt.) Gray
  leafy rayless aster
Brickellia grandiflora (Hook.) Nutt.
  tasselflower brickellbush
Brickellia microphylla (Nutt.) Gray
  littleleaf brickellbush
Brickellia microphylla var. microphylla (Nutt.) Gray
  littleleaf brickellbush
Brickellia oblongifolia Nutt.
  Mojave brickellbush
Brickellia oblongifolia var. oblongifolia Nutt.
  narrowleaf brickellbush
Cacaliopsis nardosmia (Gray) Gray
  silvercrown
Canadanthus modestus (Lindl.) Nesom
Carduus nutans L.
  nodding plumeless thistle
Centaurea biebersteinii DC.
  spotted knapweed
Centaurea calcitrapa L.
  red star thistle
Centaurea cyanus L.
  garden cornflower
Centaurea debeauxii Gren. & Godr.
  meadow knapweed
Centaurea diffusa Lam.
  white knapweed
Centaurea jacea L.
  brownray knapweed
Centaurea melitensis L.
  Maltese star thistle
Centaurea montana L.
  mountain cornflower
Centaurea nigra L.
  lesser knapweed
Centaurea nigrescens Willd.
  Tyrol knapweed
Centaurea solstitialis L.
  yellow star thistle
Chaenactis douglasii (Hook.) Hook. & Arn.
  Douglas' dustymaiden
Chaenactis douglasii var. douglasii (Hook.) Hook. & Arn.
  Douglas' dustymaiden
Chaenactis thompsonii Cronq.
  Thompson's pincushion
Chondrilla juncea L.
  hogbite
Chrysanthemum balsamita (L.) Baill., non L.
  = Balsamita major
Chrysanthemum leucanthemum L.
  = Leucanthemum vulgare
Chrysanthemum parthenium (L.) Bernh.
  = Tanacetum parthenium
Chrysothamnus nauseosus (Pallas ex Pursh) Britt.
  = Ericameria nauseosa ssp. nauseosa var. nauseosa
Chrysothamnus viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. lanceolatus (Nutt.) Hall & Clements
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. puberulus (D.C. Eat.) Hall & Clements
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Chrysothamnus viscidiflorus ssp. viscidiflorus var. viscidiflorus (Hook.) Nutt.
  green rabbitbrush
Cichorium intybus L.
  chicory
Cirsium arvense (L.) Scop.
  Canadian thistle
Cirsium brevifolium Nutt.
  Palouse thistle
Cirsium brevistylum Cronq.
  clustered thistle
Cirsium edule Nutt.
  edible thistle
Cirsium foliosum (Hook.) DC.
  elk thistle
Cirsium hookerianum Nutt.
  white thistle
Cirsium neomexicanum Gray
  New Mexico thistle
Cirsium neomexicanum var. utahense (Petrak) Welsh
  Utah thistle
Cirsium remotifolium (Hook.) DC.
  fewleaf thistle
Cirsium remotifolium ssp. oregonense Petrak
Cirsium remotifolium ssp. remotifolium (Hook.) DC.
Cirsium remotifolium var. remotifolium (Hook.) DC.
  fewleaf thistle
Cirsium scariosum Nutt.
  meadow thistle
Cirsium scariosum var. scariosum Nutt.
  meadow thistle
Cirsium undulatum (Nutt.) Spreng.
  wavyleaf thistle
Cirsium undulatum var. undulatum (Nutt.) Spreng.
  wavyleaf thistle
Cirsium vulgare (Savi) Ten.
  bull thistle
Cnicus benedictus L.
  blessed thistle
Columbiadoria hallii (Gray) Nesom
  Hall's columbiadoria
Conyza canadensis (L.) Cronq.
  Canadian horseweed
Conyza canadensis var. canadensis (L.) Cronq.
  Canadian horseweed
Conyza canadensis var. glabrata (Gray) Cronq.
  Canadian horseweed
Coreopsis tinctoria Nutt.
  golden tickseed
Coreopsis tinctoria var. atkinsoniana (Dougl. ex Lindl.) H.M. Parker
  Atkinson's tickseed
Coreopsis tinctoria var. tinctoria Nutt.
  golden tickseed
Cotula coronopifolia L.
  common brassbuttons
Crepis acuminata Nutt.
  longleaf hawksbeard
Crepis acuminata ssp. acuminata Nutt.
  longleaf hawksbeard
Crepis atribarba Heller
  slender hawksbeard
Crepis atribarba ssp. atribarba Heller
  slender hawksbeard
Crepis atribarba ssp. originalis (Babcock & Stebbins) Babcock & Stebbins
  slender hawksbeard
Crepis bakeri Greene
  Baker's hawksbeard
Crepis bakeri ssp. bakeri Greene
  Baker's hawksbeard
Crepis capillaris Wallr.
  smooth hawksbeard
Crepis intermedia Gray
  limestone hawksbeard
Crepis modocensis Greene
  Siskiyou hawksbeard
Crepis modocensis ssp. glareosa (Piper) Babcock & Stebbins
  Modoc hawksbeard
Crepis modocensis ssp. modocensis Greene
  Modoc hawksbeard
Crepis modocensis ssp. rostrata (Coville) Babcock & Stebbins
  Siskiyou hawksbeard
Crepis nana Richards.
  dwarf alpine hawksbeard
Crepis nana ssp. nana Richards.
  dwarf alpine hawksbeard
Crepis nana ssp. ramosa Babcock
  dwarf alpine hawksbeard
Crepis nicaeensis Balbis ex Pers.
  Turkish hawksbeard
Crepis occidentalis Nutt.
  largeflower hawksbeard
Crepis occidentalis ssp. conjuncta (Jepson) Babcock & Stebbins
  largeflower hawksbeard
Crepis occidentalis ssp. costata (Gray) Babcock & Stebbins
  largeflower hawksbeard
Crepis occidentalis ssp. occidentalis Nutt.
  largeflower hawksbeard
Crepis occidentalis ssp. pumila (Rydb.) Babcock & Stebbins
  largeflower hawksbeard
Crepis pleurocarpa Gray
  nakedstem hawksbeard
Crepis runcinata (James) Torr. & Gray
  fiddleleaf hawksbeard
Crepis runcinata ssp. hispidulosa (T.J. Howell ex Rydb.) Babcock & Stebbins
  fiddleleaf hawksbeard
Crepis runcinata ssp. runcinata (James) Torr. & Gray
  fiddleleaf hawksbeard
Crepis tectorum L.
  narrowleaf hawksbeard
Crocidium multicaule Hook.
  common springgold
Eatonella nivea (D.C. Eat.) Gray
  white false tickhead
Echinops exaltatus Schrad.
  tall globethistle
Echinops rito L.
  southern globethistle
Echinops rito ssp. ruthenicus (Bieb.) Nyman
  southern globethistle
Echinops sphaerocephalus L.
  great globethistle
Erechtites hieraciifolia (L.) Raf. ex DC.
  American burnweed
Erechtites hieraciifolia var. hieraciifolia (L.) Raf. ex DC.
  American burnweed
Ericameria bloomeri (Gray) J.F. Macbr.
  rabbitbush heathgoldenrod
Ericameria greenei (Gray) Nesom
  Greene's heathgoldenrod
Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird
Ericameria nauseosa ssp. nauseosa (Pallas ex Pursh) Nesom & Baird
Ericameria nauseosa ssp. nauseosa var. nana 
Ericameria nauseosa ssp. nauseosa var. nauseosa 
Ericameria nauseosa ssp. nauseosa var. speciosa 
Ericameria resinosa Nutt.
  Columbian heathgoldenrod
Ericameria viscidiflora (Hook.) L.C. Anders.
  = Chrysothamnus viscidiflorus ssp. viscidiflorus var. viscidiflorus
Erigeron acris L.
Erigeron acris ssp. acris L.
Erigeron acris ssp. acris var. debilis 
Erigeron acris ssp. politus (Fries) Schinz & R. Keller
Erigeron aliceae T.J. Howell
  Alice Eastwood's fleabane
Erigeron annuus (L.) Pers.
  eastern daisy fleabane
Erigeron aureus Greene
  alpine yellow fleabane
Erigeron aureus var. aureus Greene
  alpine yellow fleabane
Erigeron basalticus Hoover
  basalt fleabane
Erigeron bloomeri Gray
  scabland fleabane
Erigeron bloomeri var. bloomeri Gray
  scabland fleabane
Erigeron caespitosus Nutt.
  tufted fleabane
Erigeron canadensis L.
  = Conyza canadensis var. canadensis
Erigeron chrysopsidis Gray
  dwarf yellow fleabane
Erigeron chrysopsidis ssp. chrysopsidis Gray
  dwarf yellow fleabane
Erigeron compositus Pursh
  cutleaf daisy
Erigeron compositus var. compositus Pursh
  dwarf mountain fleabane
Erigeron corymbosus Nutt.
  longleaf fleabane
Erigeron disparipilus Cronq.
  white cushion fleabane
Erigeron divergens Torr. & Gray
  spreading fleabane
Erigeron eatonii Gray
  Eaton's fleabane
Erigeron eatonii var. villosus (Cronq.) Cronq.
  Eaton's fleabane
Erigeron elatus (Hook.) Greene
Erigeron filifolius (Hook.) Nutt.
  threadleaf fleabane
Erigeron filifolius var. filifolius (Hook.) Nutt.
  threadleaf fleabane
Erigeron filifolius var. robustior M.E. Peck
  threadleaf fleabane
Erigeron flettii G.N. Jones
  Flett's fleabane
Erigeron howellii Gray
  Howell's fleabane
Erigeron humilis Graham
  arctic alpine fleabane
Erigeron inornatus (Gray) Gray
  California rayless fleabane
Erigeron inornatus var. inornatus (Gray) Gray
  California rayless fleabane
Erigeron leibergii Piper
  Leiberg's fleabane
Erigeron linearis (Hook.) Piper
  desert yellow fleabane
Erigeron lonchophyllus Hook.
Erigeron oreganus Gray
  gorge fleabane
Erigeron peregrinus (Banks ex Pursh) Greene
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus (Greene) Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus var. angustifolius (Gray) Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus var. callianthemus (Greene) Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. callianthemus var. scaposus (Torr. & Gray) Cronq.
  subalpine fleabane
Erigeron peregrinus ssp. peregrinus (Banks ex Pursh) Greene
  subalpine fleabane
Erigeron peregrinus ssp. peregrinus var. dawsonii Greene
  Dawson's fleabane
Erigeron peregrinus ssp. peregrinus var. thompsonii (Blake ex J.W. Thompson) Cronq.
  Thompson's erigeron
Erigeron philadelphicus L.
  Philadelphia fleabane
Erigeron piperianus Cronq.
  Piper's fleabane
Erigeron poliospermus Gray
  purple cushion fleabane
Erigeron poliospermus var. cereus Cronq.
  purple cushion fleabane
Erigeron poliospermus var. poliospermus Gray
  purple cushion fleabane
Erigeron pumilus Nutt.
  shaggy fleabane
Erigeron pumilus ssp. intermedius Cronq.
  shaggy fleabane
Erigeron pumilus ssp. intermedius var. intermedius (Cronq.) Cronq.
  shaggy fleabane
Erigeron speciosus (Lindl.) DC.
  aspen fleabane
Erigeron speciosus var. macranthus (Nutt.) Cronq.
  aspen fleabane
Erigeron speciosus var. speciosus (Lindl.) DC.
  aspen fleabane
Erigeron strigosus Muhl. ex Willd.
  prairie fleabane
Erigeron strigosus var. septentrionalis (Fern. & Wieg.) Fern.
  prairie fleabane
Erigeron strigosus var. strigosus Muhl. ex Willd.
  prairie fleabane
Erigeron subtrinervis Rydb. ex Porter & Britt.
  threenerve fleabane
Erigeron subtrinervis var. conspicuus (Rydb.) Cronq.
  threenerve fleabane
Eriophyllum Lag.
  woollysunflower
Eriophyllum lanatum (Pursh) Forbes
  woolly eriophyllum
Eriophyllum lanatum var. achillaeoides (DC.) Jepson
  common woollysunflower
Eriophyllum lanatum var. integrifolium (Hook.) Smiley
  common woollysunflower
Eriophyllum lanatum var. lanatum (Pursh) Forbes
  common woollysunflower
Eriophyllum lanatum var. leucophyllum (DC.) W.R. Carter
  common woollysunflower
Eucephalus engelmannii (D.C. Eat.) Greene
Eucephalus glaucescens (Gray) Greene
Eucephalus paucicapitatus (B.L. Robins.) Greene
Eupatorium maculatum L.
  spotted joepyeweed
Eupatorium maculatum var. bruneri (Gray) Breitung
  spotted joepyeweed
Eupatorium occidentale Hook.
  = Ageratina occidentalis
Euthamia graminifolia (L.) Nutt.
  flattop goldentop
Euthamia occidentalis Nutt.
  western goldentop
Filago arvensis L.
  field cottonrose
Franseria 
  = Ambrosia 
Gaillardia aristata Pursh
  common gaillardia
Galinsoga Ruiz & Pavon
  galinsoga
Galinsoga quadriradiata Ruiz & Pavon
  shaggysoldier
Gamochaeta purpurea (L.) Cabrera
  spoonleaf purple everlasting
Gnaphalium arvense L.
  = Filago arvensis
Gnaphalium californicum DC.
  = Pseudognaphalium californicum
Gnaphalium margaritaceum L.
  = Anaphalis margaritacea
Gnaphalium palustre Nutt.
  western marsh cudweed
Gnaphalium uliginosum L.
  marsh cudweed
Grindelia columbiana (Piper) Rydb.
  Columbia River gumweed
Grindelia integrifolia DC.
  Puget Sound gumweed
Grindelia integrifolia var. integrifolia DC.
  Puget Sound gumweed
Grindelia nana Nutt.
  Idaho gumweed
Grindelia nana var. integerrima (Rydb.) Steyermark
  Idaho gumweed
Grindelia nana var. nana Nutt.
  Idaho gumweed
Grindelia squarrosa (Pursh) Dunal
  curlycup gumweed
Grindelia squarrosa var. serrulata (Rydb.) Steyermark
  curlycup gumweed
Grindelia squarrosa var. squarrosa (Pursh) Dunal
  curlycup gumweed
Grindelia stricta DC.
Grindelia stricta var. stricta DC.
Gutierrezia sarothrae (Pursh) Britt. & Rusby
  broom snakeweed
Gutierrezia tenuis Greene
  = Gutierrezia sarothrae
Haplopappus alpigenus Torr. & Gray
  = Oreostemma alpigenum var. alpigenum
Haplopappus bloomeri Gray
  = Ericameria bloomeri
Haplopappus brandegei Gray
  = Erigeron aureus var. aureus
Haplopappus carthamoides (Hook.) Gray
  = Pyrrocoma carthamoides var. carthamoides
Haplopappus greenei Gray
  = Ericameria greenei
Haplopappus hallii Gray
  = Columbiadoria hallii
Haplopappus lanuginosus Gray
  = Stenotus lanuginosus var. lanuginosus
Haplopappus liatriformis (Greene) St. John
  = Pyrrocoma liatriformis
Haplopappus lyallii Gray
  = Tonestus lyallii
Haplopappus resinosus (Nutt.) Gray
  = Ericameria resinosa
Haplopappus stenophyllus Gray
  = Stenotus stenophyllus
Helenium autumnale L.
  common sneezeweed
Helenium autumnale var. grandiflorum (Nutt.) Torr. & Gray
  fall sneezeweed
Helenium autumnale var. montanum (Nutt.) Fern.
  mountain sneezeweed
Helianthella uniflora (Nutt.) Torr. & Gray
  oneflower helianthella
Helianthella uniflora var. douglasii (Torr. & Gray) W.A. Weber
  Douglas' helianthella
Helianthus annuus L.
  common sunflower
Helianthus cusickii Gray
  Cusick's sunflower
Helianthus grosseserratus Martens
  sawtooth sunflower
Helianthus maximiliani Schrad.
  Maximilian sunflower
Helianthus nuttallii Torr. & Gray
  Nuttall's sunflower
Helianthus nuttallii ssp. nuttallii Torr. & Gray
  Nuttall's sunflower
Helianthus petiolaris Nutt.
  prairie sunflower
Helianthus petiolaris ssp. petiolaris Nutt.
  prairie sunflower
Helianthus tuberosus L.
  Jerusalem artichoke
Heliopsis helianthoides (L.) Sweet
  sunflower heliopsis
Heliopsis helianthoides var. scabra (Dunal) Fern.
  smooth oxeye
Hemizonia pungens (Hook. & Arn.) Torr. & Gray
  common spikeweed
Hemizonia pungens ssp. septentrionalis Keck
  common tarweed
Heterotheca barbata (Rydb.) Semple
  Spokane falsegoldenaster
Heterotheca oregona (Nutt.) Shinners
  Oregon goldenaster
Heterotheca oregona var. oregona (Nutt.) Shinners
  Oregon goldenaster
Heterotheca villosa (Pursh) Shinners
  hairy goldenaster
Heterotheca villosa var. hispida (Hook.) Harms
  bristly hairy goldaster
Heterotheca villosa var. villosa (Pursh) Shinners
  hairy goldenaster
Hieracium albiflorum Hook.
  white hawkweed
Hieracium aurantiacum L.
  orange hawkweed
Hieracium canadense Michx.
  Canadian hawkweed
Hieracium canadense var. canadense Michx.
  Canadian hawkweed
Hieracium gracile Hook.
  slender hawkweed
Hieracium gracile var. detonsum (Gray) Gray
  low alpine hawkweed
Hieracium gracile var. gracile Hook.
  slender hawkweed
Hieracium longiberbe T.J. Howell
  longbeard hawkweed
Hieracium scouleri Hook.
  woollyweed
Hieracium scouleri var. scouleri Hook.
  Scouler's woollyweed
Hieracium umbellatum L.
  narrowleaf hawkweed
Hulsea nana Gray
  dwarf alpinegold
Hymenopappus filifolius Hook.
  fineleaf hymenopappus
Hymenopappus filifolius var. filifolius Hook.
  fineleaf hymenopappus
Hypochaeris glabra L.
  smooth catsear
Hypochaeris radicata L.
  hairy catsear
Ionactis stenomeres (Gray) Greene
  ionactis
Iva axillaris Pursh
  povertyweed
Iva xanthifolia Nutt.
  giant sumpweed
Jaumea carnosa (Less.) Gray
  marsh jaumea
Lactuca biennis (Moench) Fern.
  tall blue lettuce
Lactuca canadensis L.
  Canada lettuce
Lactuca ludoviciana (Nutt.) Riddell
  biannual lettuce
Lactuca sativa L.
  garden 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
Lagophylla ramosissima Nutt.
  branched lagophylla
Lapsana communis L.
  common nipplewort
Lasthenia glaberrima DC.
  smooth goldfields
Lasthenia maritima (Gray) Ornduff
  seaside goldfields
Layia glandulosa (Hook.) Hook. & Arn.
  whitedaisy tidytips
Layia glandulosa ssp. glandulosa (Hook.) Hook. & Arn.
  whitedaisy tidytips
Leontodon autumnalis L.
  fall dandelion
Leontodon taraxacoides (Vill.) Merat
  lesser hawkbit
Leucanthemum leucanthemum (L.) Rydb.
  = Leucanthemum vulgare
Leucanthemum maximum (Ramond) DC.
  Shasta daisy
Leucanthemum vulgare Lam.
  oxeyedaisy
Luina hypoleuca Benth.
  littleleaf silverback
Lygodesmia juncea (Pursh) D. Don ex Hook.
  rush skeletonplant
Machaeranthera canescens (Pursh) Gray
  hoary aster
Machaeranthera canescens ssp. canescens (Pursh) Gray
  hoary aster
Machaeranthera canescens ssp. canescens var. canescens (Pursh) Gray
  cutleaf goldenweed
Machaeranthera canescens ssp. canescens var. incana (Lindl.) Gray
  cutleaf goldenweed
Madia citriodora Greene
  lemonscented madia
Madia elegans D. Don ex Lindl.
  common madia
Madia elegans ssp. elegans D. Don ex Lindl.
  common madia
Madia exigua (Sm.) Gray
  small tarweed
Madia glomerata Hook.
  mountain tarweed
Madia gracilis (Sm.) Keck & J. Clausen ex Applegate
  grassy tarweed
Madia gracilis ssp. gracilis (Sm.) Keck & J. Clausen ex Applegate
  grassy tarweed
Madia madioides (Nutt.) Greene
  woodland madia
Madia minima (Gray) Keck
  oppositeleaved tarweed
Madia sativa Molina
  coast tarweed
Matricaria chamomilla L. 1755 & 1763, non 1753
  = Matricaria recutita
Matricaria discoidea DC.
  disc mayweed
Matricaria matricarioides (Less.) Porter
  = Matricaria discoidea
Matricaria recutita L.
  mayweed
Matricaria suaveolens (Pursh) Buch., non L.
  = Matricaria discoidea
Matricaria suaveolens L.
  = Matricaria recutita
Megalodonta beckii (Torr. ex Spreng.) Greene
  aquatic beggartick
Megalodonta beckii var. beckii (Torr. ex Spreng.) Greene
  Beck's watermarigold
Microseris bigelovii (Gray) Schultz-Bip.
  coastal silverpuffs
Microseris borealis (Bong.) Schultz-Bip.
  apargidium
Microseris laciniata (Hook.) Schultz-Bip.
  cutleaf silverpuffs
Microseris laciniata ssp. laciniata (Hook.) Schultz-Bip.
  cutleaf silverpuffs
Microseris nutans (Hook.) Schultz-Bip.
  nodding microceris
Microseris nutans ssp. nutans (Hook.) Schultz-Bip.
  nodding silverpuffs
Mycelis muralis (L.) Dumort.
  walllettuce
Nothocalais alpestris (Gray) Chambers
  alpine lake prairiedandelion
Nothocalais troximoides (Gray) Greene
  weevil microseris
Onopordum acanthium L.
  Scotch cottonthistle
Oreostemma alpigenum (Torr. & Gray) Nesom
Oreostemma alpigenum var. alpigenum (Torr. & Gray) Nesom
Petasites frigidus (L.) Fries
  Arctic sweet coltsfoot
Petasites frigidus var. frigidus (L.) Fries
  Arctic sweet coltsfoot
Petasites frigidus var. nivalis (Greene) Cronq.
  Arctic sweet coltsfoot
Petasites frigidus var. palmatus (Ait.) Cronq.
  Arctic sweet coltsfoot
Petasites palmatus (Ait.) Gray
  = Petasites frigidus var. palmatus
Petasites sagittatus (Banks ex Pursh) Gray
  arrowleaf sweet coltsfoot
Prenanthes alata (Hook.) D. Dietr.
  western rattlesnakeroot
Pseudognaphalium californicum (DC.) A. Anderb.
Pseudognaphalium canescens (DC.) W.A. Weber
Pseudognaphalium canescens ssp. microcephalum (Nutt.) Kartesz, comb. nov. ined.
Pseudognaphalium luteoalbum (L.) Hilliard & Burtt
Pseudognaphalium stramineum (Kunth) W.A. Weber
Pseudognaphalium viscosum (Kunth) W.A. Weber
Psilocarphus brevissimus Nutt.
  short woollyheads
Psilocarphus brevissimus var. brevissimus Nutt.
  short woollyheads
Psilocarphus elatior (Gray) Gray
  meadow woollyheads
Psilocarphus oregonus Nutt.
  Oregon woollyheads
Psilocarphus tenellus Nutt.
  slender woollyheads
Psilocarphus tenellus var. tenellus Nutt.
  slender woollyheads
Pyrrocoma carthamoides Hook.
  largeflower goldenweed
Pyrrocoma carthamoides var. carthamoides Hook.
  loved goldenweed
Pyrrocoma carthamoides var. cusickii (Gray) Kartesz & Gandhi
  narrowhead goldenweed
Pyrrocoma hirta (Gray) Greene
  tacky goldenweed
Pyrrocoma hirta var. sonchifolia (Greene) Kartesz & Gandhi
  tacky goldenweed
Pyrrocoma liatriformis Greene
  smallhead goldenweed
Rainiera stricta (Greene) Greene
  false silverback
Rigiopappus leptocladus Gray
  wireweed
Rudbeckia alpicola Piper
Rudbeckia hirta L.
  blackeyed Susan
Rudbeckia hirta var. pulcherrima Farw.
  blackeyed Susan
Rudbeckia occidentalis Nutt.
  western coneflower
Rudbeckia occidentalis var. occidentalis Nutt.
  western coneflower
Saussurea americana D.C. Eat.
  American saussurea
Senecio bolanderi Gray
  Bolander's ragwort
Senecio bolanderi var. bolanderi Gray
  Bolander's ragwort
Senecio bolanderi var. harfordii (Greenm.) T.M. Barkl.
  Harford's ragwort
Senecio canus Hook.
  woolly groundsel
Senecio cymbalaria Pursh
  dwarf arctic ragwort
Senecio cymbalarioides Buek
  cleftleaf groundsel
Senecio elmeri Piper
  Elmer's ragwort
Senecio flettii Wieg.
  Flett's ragwort
Senecio fremontii Torr. & Gray
  Fremont's groundsel
Senecio fremontii var. fremontii Torr. & Gray
  Fremont's groundsel
Senecio hydrophiloides Rydb.
  tall groundwel
Senecio hydrophilus Nutt.
  water groundsel
Senecio indecorus Greene
  elegant groundsel
Senecio integerrimus Nutt.
  lambstongue groundsel
Senecio integerrimus var. exaltatus (Nutt.) Cronq.
  Columbia groundsel
Senecio integerrimus var. ochroleucus (Gray) Cronq.
  paleyellow groundsel
Senecio jacobaea L.
  stinking willie
Senecio lugens Richards.
  small blacktip groundsel
Senecio macounii Greene
  Siskiyou Mountain ragwort
Senecio neowebsteri Blake
  Olympic Mountain ragwort
Senecio pauciflorus Pursh
  alpine groundsel
Senecio pauperculus Michx.
  balsam groundsel
Senecio pseudaureus Rydb.
  falsegold groundsel
Senecio pseudaureus var. pseudaureus Rydb.
  falsegold groundsel
Senecio serra Hook.
  butterweed groundsel
Senecio serra var. serra Hook.
  tall ragwort
Senecio streptanthifolius Greene
  cleftleaf groundsel
Senecio streptanthifolius var. streptanthifolius Greene
  cleftleaf groundsel
Senecio sylvaticus L.
  woodland ragwort
Senecio triangularis Hook.
  arrowleaf groundsel
Senecio vulgaris L.
  common groundsel
Sericocarpus oregonensis Nutt.
Sericocarpus oregonensis var. oregonensis Nutt.
Sericocarpus rigidus Lindl.
Silybum marianum (L.) Gaertn.
  blessed milkthistle
Solidago canadensis L.
  Canada goldenrod
Solidago canadensis var. gilvocanescens Rydb.
  shorthair goldenrod
Solidago canadensis var. salebrosa (Piper) M.E. Jones
  salebrosa goldenrod
Solidago gigantea Ait.
  giant goldenrod
Solidago missouriensis Nutt.
  Missouri goldenrod
Solidago missouriensis var. fasciculata Holz.
  Missouri goldenrod
Solidago missouriensis var. missouriensis Nutt.
  Missouri goldenrod
Solidago missouriensis var. tolmieana (Gray) Cronq.
  Tolmies' goldenrod
Solidago multiradiata Ait.
  mountain goldenrod
Solidago multiradiata var. scopulorum Gray
  manyray goldenrod
Solidago simplex Kunth
  Mt. Albert goldenrod
Solidago simplex ssp. simplex Kunth
  Mt. Albert goldenrod
Solidago simplex ssp. simplex var. nana (Gray) Ringius
  dwarf goldenrod
Solidago simplex ssp. simplex var. simplex Kunth
  Mt. Albert goldenrod
Solidago simplex ssp. simplex var. spathulata 
Solidago spathulata var. spathulata DC.
  coastaldune goldenrod
Solidago uliginosa Nutt.
  bog goldenrod
Sonchus arvensis L.
  field sowthistle
Sonchus arvensis ssp. arvensis L.
  field sowthistle
Sonchus arvensis ssp. uliginosus (Bieb.) Nyman
  moist sowthistle
Sonchus asper (L.) Hill
  spiny sowthistle
Sonchus oleraceus L.
  common sowthistle
Stenotus lanuginosus (Gray) Greene
  woolly mock goldenweed
Stenotus lanuginosus var. lanuginosus (Gray) Greene
  cespitose goldenweed
Stenotus stenophyllus (Gray) Greene
  narrowleaf goldenweed
Stephanomeria paniculata Nutt.
  tufted wirelettuce
Stephanomeria tenuifolia (Raf.) Hall
  narrowleaf wirelettuce
Stephanomeria tenuifolia var. tenuifolia (Raf.) Hall
  narrowleaf wirelettuce
Tanacetum balsamita L.
  = Balsamita major
Tanacetum camphoratum Less.
  camphor tansy
Tanacetum parthenium (L.) Schultz-Bip.
  feverfew
Tanacetum vulgare L.
  common tansy
Taraxacum eriophorum Rydb.
  woolbearing dandelion
Taraxacum laevigatum (Willd.) DC.
  rock dandelion
Taraxacum lyratum (Ledeb.) DC.
  harp dandelion
Taraxacum officinale G.H. Weber ex Wiggers
  common dandelion
Taraxacum officinale ssp. ceratophorum (Ledeb.) Schinz ex Thellung
  fleshy dandelion
Taraxacum officinale ssp. officinale G.H. Weber ex Wiggers
  wandering dandelion
Tetradymia canescens DC.
  spineless horsebrush
Tonestus lyallii (Gray) A. Nels.
  Lyall's goldenweed
Townsendia florifer (Hook.) Gray
  showy townsendia
Tragopogon dubius Scop.
  yellow salsify
Tragopogon mirus Ownbey
  remarkable goatsbeard
Tragopogon miscellus Ownbey
  Moscow salsify
Tragopogon porrifolius L.
  salsify
Tragopogon pratensis L.
  meadow salsify
Trimorpha acris (L.) Nesom
  bitter boreal daisy
Trimorpha lonchophylla var. lonchophylla (Hook.) Nesom
  spearleaf fleabane
Tripleurospermum maritima (L.) W.D.J. Koch
Tripleurospermum maritima ssp. maritima (L.) W.D.J. Koch
Uropappus linearifolius Nutt.
Wyethia amplexicaulis (Nutt.) Nutt.
  mulesears wyethia
Wyethia angustifolia (DC.) Nutt.
  California compassplant
Xanthium spinosum L.
  spiny cockleburr
Xanthium strumarium L.
  rough cockleburr
Xanthium strumarium var. canadense (P. Mill.) Torr. & Gray
  Canada cockleburr
Xanthium strumarium var. glabratum (DC.) Cronq.
  rough cockleburr

CONVOLVULACEAE
Calystegia atriplicifolia Hallier f.
  nightblooming false bindweed
Calystegia atriplicifolia ssp. atriplicifolia Hallier f.
  nightblooming false bindweed
Calystegia sepium (L.) R. Br.
  hedge false bindweed
Calystegia sepium ssp. sepium (L.) R. Br.
  hedge false bindweed
Calystegia soldanella (L.) R. Br. ex Roemer & J.A. Schultes
  seashore false bindweed
Convolvulus arvensis L.
  field bindweed
Convolvulus sepium L.
  = Calystegia sepium ssp. sepium
Cuscuta approximata Bab.
  alfalfa dodder
Cuscuta approximata var. urceolata (Kunze) Yuncker
  alfalfa dodder
Cuscuta californica Hook. & Arn.
  chaparral dodder
Cuscuta californica var. breviflora Engelm.
  California dodder
Cuscuta californica var. californica Hook. & Arn.
  California dodder
Cuscuta cephalanthi Engelm.
  buttonbush dodder
Cuscuta denticulata Engelm.
  desert dodder
Cuscuta epilinum Weihe
  flax dodder
Cuscuta epithymum L.
  clover dodder
Cuscuta pentagona Engelm.
  fiveangled dodder
Cuscuta pentagona var. pentagona Engelm.
  fiveangled dodder
Cuscuta planiflora Ten.
  smallseed dodder
Cuscuta salina Engelm.
  saltmarsh dodder
Cuscuta salina var. major Yuncker
  goldenthread
Cuscuta salina var. salina Engelm.
  saltmarsh dodder
Cuscuta suksdorfii Yuncker
  mountain dodder
Cuscuta suksdorfii var. suksdorfii Yuncker
  Suksdorf's dodder

CORNACEAE
Cornus alba L. p.p.
  = Cornus sericea ssp. sericea
Cornus canadensis L.
  bunchberry dogwood
Cornus nuttallii Audubon ex Torr. & Gray
  Pacific dogwood
Cornus sericea L.
  redosier dogwood
Cornus sericea ssp. occidentalis (Torr. & Gray) Fosberg
  western dogwood
Cornus sericea ssp. sericea L.
  redosier dogwood
Cornus stolonifera Michx.
  = Cornus sericea ssp. sericea
Cornus unalaschkensis Ledeb.
  western cordilleran bunchberry

CRASSULACEAE
Crassula aquatica (L.) Schoenl.
  water pygmyweed
Crassula saginoides (Maxim.) Bywater & Wickens
  wrinkleseed pygmyweed
Rhodiola 
  = Sedum 
Sedum acre L.
  goldmoss stonecrop
Sedum borschii (Clausen) Clausen
  Leiberg stonecrop
Sedum divergens S. Wats.
  Pacific stonecrop
Sedum integrifolium (Raf.) A. Nels.
  ledge stonecrop
Sedum integrifolium ssp. integrifolium (Raf.) A. Nels.
  entireleaf stonecrop
Sedum lanceolatum Torr.
  spearleaf stonecrop
Sedum lanceolatum ssp. lanceolatum Torr.
  spearleaf stonecrop
Sedum lanceolatum ssp. nesioticum (G.N. Jones) Clausen
  spearleaf stonecrop
Sedum oreganum Nutt.
  kings crown
Sedum oreganum ssp. oreganum Nutt.
  Oregon stonecrop
Sedum oreganum ssp. tenue Clausen
  Oregon stonecrop
Sedum rosea (L.) Scop.
  roseroot stonecrop
Sedum rupicola G.N. Jones
  curvedleaf stonecrop
Sedum spathulifolium Hook.
  broadleaf stonecrop
Sedum spathulifolium ssp. pruinosum (Britt.) Clausen & Uhl
  broadleaf stonecrop
Sedum spathulifolium ssp. spathulifolium Hook.
  broadleaf stonecrop
Sedum stenopetalum Pursh
  wormleaf stonecrop
Sedum stenopetalum ssp. monanthum (Suksdorf) Clausen
  wormleaf stonecrop
Sedum stenopetalum ssp. stenopetalum Pursh
  wormleaf stonecrop
Tillaea 
  = Crassula 

CROSSOSOMATACEAE
Forsellesia arida (M.E. Jones) Heller
  = Glossopetalon spinescens var. aridum
Forsellesia nevadensis (Gray) Greene
  = Glossopetalon spinescens var. aridum
Forsellesia stipulifera (St. John) Ensign
  = Glossopetalon spinescens var. aridum
Glossopetalon Gray
  greasebush
Glossopetalon nevadense Gray
  = Glossopetalon spinescens var. aridum
Glossopetalon nevadense var. stipuliferum (St. John) C.L. Hitchc.
  = Glossopetalon spinescens var. aridum
Glossopetalon spinescens Gray
  spiny greasebush
Glossopetalon spinescens var. aridum M.E. Jones
  spiny greasebush

CRUCIFERAE
Alyssum alyssoides (L.) L.
  pale madwort
Alyssum desertorum Stapf
  desert madwort
Arabidopsis thaliana (L.) Heynh.
  mouseear cress
Arabis X divaricarpa A. Nels. (pro sp.)
  spreadingpod rockcress
Arabis crucisetosa Constance & Rollins
  wetsoil rockcress
Arabis cusickii S. Wats.
  Cusick's rockcress
Arabis drummondii Gray
  Drummond's rockcress
Arabis furcata S. Wats.
  Columbia Gorge rockcress
Arabis furcata var. furcata S. Wats.
  Columbia Gorge rockcress
Arabis furcata var. olympica (Piper) Rollins
  Columbia Gorge rockcress
Arabis glabra (L.) Bernh.
  tower rockcress
Arabis glabra var. glabra (L.) Bernh.
  tower rockcress
Arabis hirsuta (L.) Scop.
  hairy rockcress
Arabis hirsuta var. eschscholtziana (Andrz.) Rollins
  Eschscholtz's hairy rockcress
Arabis hirsuta var. glabrata Torr. & Gray
  mountain rockcress
Arabis holboellii Hornem.
  Holboell's rockcress
Arabis holboellii var. holboellii Hornem.
  Holboell's rockcress
Arabis holboellii var. pendulocarpa (A. Nels.) Rollins
  dropseed rockcress
Arabis holboellii var. pinetorum (Tidestrom) Rollins
  Holboell's rockcress
Arabis holboellii var. retrofracta (Graham) Rydb.
  second rockcress
Arabis lemmonii S. Wats.
  Lemmon's rockcress
Arabis lemmonii var. lemmonii S. Wats.
  Lemmon's rockcress
Arabis lemmonii var. paddoensis Rollins
  Paddo rockcress
Arabis lyallii S. Wats.
  Lyall's rockcress
Arabis lyrata L.
  lyrate rockcress
Arabis lyrata var. kamchatica Fisch. ex DC.
  Kamchatica rockcress
Arabis microphylla Nutt.
  littleleaf rockcress
Arabis microphylla var. microphylla Nutt.
  smallleaf rockcress
Arabis nuttallii B.L. Robins.
  Nuttall's rockcress
Arabis perennans S. Wats.
  perennial rockcress
Arabis puberula Nutt.
  silver rockcress
Arabis sparsiflora Nutt.
  sicklepod rockcress
Arabis sparsiflora var. atrorubens (Suksdorf ex Greene) Rollins
  elegant rockcress
Arabis sparsiflora var. sparsiflora Nutt.
  sicklepod rockcress
Arabis sparsiflora var. subvillosa (S. Wats.) Rollins
  hairystem rockcress
Arabis suffrutescens S. Wats.
  woody rockcress
Arabis suffrutescens var. suffrutescens S. Wats.
  woody rockcress
Armoracia rusticana P.G. Gaertn., B. Mey. & Scherb.
  horseradish
Athysanus pusillus (Hook.) Greene
  common sandweed
Barbarea orthoceras Ledeb.
  American yellowrocket
Barbarea verna (P. Mill.) Aschers.
  early yellowrocket
Barbarea vulgaris Ait. f.
  garden yellowrocket
Berteroa incana (L.) DC.
  hoary false madwort
Brassica juncea (L.) Czern.
  India mustard
Brassica nigra (L.) W.D.J. Koch
  black mustard
Brassica oleracea L.
  cabbage
Brassica oleracea var. acephala DC.
  cabbage
Brassica rapa L.
  rape mustard
Brassica rapa var. rapa L.
  birdrape
Cakile edentula (Bigelow) Hook.
  American searocket
Camelina microcarpa DC.
  littlepod falseflax
Camelina sativa (L.) Crantz
  gold-of-pleasure
Capsella bursa-pastoris (L.) Medik.
  shepherd's purse
Cardamine angulata Hook.
  seaside bittercress
Cardamine bellidifolia L.
  alpine bittercress
Cardamine bellidifolia var. bellidifolia L.
  alpine bittercress
Cardamine breweri S. Wats.
  Brewer's bittercress
Cardamine breweri var. breweri S. Wats.
  Brewer's bittercress
Cardamine breweri var. leibergii (Holz.) C.L. Hitchc.
  Leiberg's bittercress
Cardamine breweri var. orbicularis (Greene) Detling
  Sierran bittercress
Cardamine cordifolia Gray
  heartleaf bittercress
Cardamine cordifolia var. lyallii (S. Wats.) A. Nels. & J.F. Macbr.
Cardamine nuttallii Greene
  Nuttall's toothwort
Cardamine nuttallii var. nuttallii Greene
  palmate toothwort
Cardamine occidentalis (S. Wats. ex B.L. Robins.) T.J. Howell
  big western bittercress
Cardamine oligosperma Nutt.
  Idaho bittercress
Cardamine oligosperma var. kamtschatica (Regel) Detling
  umbel bittercress
Cardamine oligosperma var. oligosperma Nutt.
  little western bittercress
Cardamine pensylvanica Muhl. ex Willd.
  Pennsylvania bittercress
Cardaria chalapensis (L.) Hand.-Maz.
Cardaria draba (L.) Desv.
  pepperweed whitetop
Cardaria draba ssp. draba (L.) Desv.
  heartpod hoarycress
Cardaria pubescens (C.A. Mey.) Jarmolenko
  hairy whitetop
Caulanthus lasiophyllus var. lasiophyllus (Hook. & Arn.) Payson
  coast range wild cabbage
Chorispora tenella (Pallas) DC.
  crossflower
Cochlearia armoracia L.
  = Armoracia rusticana
Cochlearia groenlandica L.
  Danish scurvygrass
Conringia orientalis (L.) Dumort.
  hare's ear mustard
Coronopus didymus (L.) Sm.
  lesser swinecress
Cusickiella douglasii (Gray) Rollins
  alkali false whitlowgrass
Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn
  mountain tansymustard
Descurainia incana ssp. incisa (Engelm.) Kartesz & Gandhi
  mountain tansymustard
Descurainia incana ssp. viscosa (Rydb.) Kartesz & Gandhi
  mountain tansymustard
Descurainia pinnata (Walt.) Britt.
  western tansymustard
Descurainia pinnata ssp. filipes (Gray) Detling
  western tansymustard
Descurainia pinnata ssp. nelsonii (Rydb.) Detling
  Nelson's tansymustard
Descurainia sophia (L.) Webb ex Prantl
  herb sophia
Draba albertina Greene
  slender whitlowgrass
Draba aurea Vahl ex Hornem.
  golden whitlowgrass
Draba aureola S. Wats.
  Mt. Lassen whitlowgrass
Draba breweri S. Wats.
  cushion whitlowgrass
Draba breweri var. cana (Rydb.) Rollins
Draba crassifolia Graham
  snowbed whitlowgrass
Draba crassifolia var. crassifolia Graham
  snowbed whitlowgrass
Draba densifolia Nutt.
  denseleaf whitlowgrass
Draba incerta Payson
  Yellowstone whitlowgrass
Draba lonchocarpa Rydb.
  lancepod whitlowgrass
Draba lonchocarpa var. lonchocarpa Rydb.
  lancepod whitlowgrass
Draba lonchocarpa var. thompsonii (C.L. Hitchc.) Rollins
  Thompson's whitlowgrass
Draba longipes Raup
  longstalk whitlowgrass
Draba nemorosa L.
  woodland whitlowgrass
Draba oligosperma Hook.
  fewseed whitlowgrass
Draba paysonii J.F. Macbr.
  Payson's whitlowgrass
Draba paysonii var. treleasii (O.E. Schulz) C.L. Hitchc.
  Trelease's whitlowgrass
Draba platycarpa Torr. & Gray
  broadpod whitlowgrass
Draba praealta Greene
  tall whitlowgrass
Draba reptans (Lam.) Fern.
  Carolina whitlowgrass
Draba ruaxes Payson & St. John
  Rainier whitlowgrass
Draba verna L.
  spring whitlowgrass
Eruca vesicaria (L.) Cav.
  rocketsalad
Eruca vesicaria ssp. sativa (P. Mill.) Thellung
  rocketsalad
Erucastrum gallicum (Willd.) O.E. Schulz
  common dogmustard
Erysimum arenicola S. Wats.
  cascade wallflower
Erysimum arenicola var. arenicola S. Wats.
  cascade wallflower
Erysimum arenicola var. torulosum (Piper) C.L. Hitchc.
  cascade wallflower
Erysimum capitatum (Dougl. ex Hook.) Greene
  sanddune wallflower
Erysimum capitatum var. capitatum (Dougl. ex Hook.) Greene
  sanddune wallflower
Erysimum cheiranthoides L.
  wormseed wallflower
Erysimum inconspicuum (S. Wats.) MacM.
  shy wallflower
Erysimum inconspicuum var. inconspicuum (S. Wats.) MacM.
  shy wallflower
Erysimum occidentale (S. Wats.) B.L. Robins.
  pale wallflower
Erysimum repandum L.
  spreading wallflower
Euclidium syriacum (L.) Ait. f.
  Syrian mustard
Guillenia lasiophylla (Hook. & Arn.) Greene
Halimolobos whitedii (Piper) Rollins
  Whited's fissurewort
Hesperis matronalis L.
  dames rocket
Hutchinsia procumbens (L.) Desv.
  prostrate hutchinsia
Idahoa scapigera (Hook.) A. Nels. & J.F. Macbr.
  oldstem idahoa
Lepidium bourgeauanum Thellung
  Bourgeau's pepperweed
Lepidium campestre (L.) Ait. f.
  field pepperweed
Lepidium densiflorum Schrad.
  common pepperweed
Lepidium densiflorum var. densiflorum Schrad.
  common pepperweed
Lepidium densiflorum var. elongatum (Rydb.) Thellung
  tall pepperweed
Lepidium densiflorum var. macrocarpum Mulligan
  bigseed pepperweed
Lepidium densiflorum var. pubecarpum (A. Nels.) Thellung
  babyseed pepperweed
Lepidium dictyotum Gray
  net pepperweed
Lepidium dictyotum var. acutidens Gray
  alkali pepperwort
Lepidium dictyotum var. dictyotum Gray
  alkali pepperweed
Lepidium nitidum Nutt.
  shining pepperweed
Lepidium nitidum var. nitidum Nutt.
  shining pepperweed
Lepidium oxycarpum Torr. & Gray
  forked pepperweed
Lepidium perfoliatum L.
  clasping pepperweed
Lepidium ramosissimum A. Nels.
  manybranched pepperweed
Lepidium sativum L.
  gardencress pepperweed
Lepidium virginicum L.
  Virginia pepperweed
Lepidium virginicum var. medium (Greene) C.L. Hitchc.
  medium pepperweed
Lepidium virginicum var. menziesii (DC.) C.L. Hitchc.
  Menzies' pepperweed
Lepidium virginicum var. pubescens (Greene) Thellung
  hairy pepperweed
Lesquerella douglasii S. Wats.
  Douglas' bladderpod
Lesquerella kingii ssp. diversifolia (Greene) Rollins & Shaw
  Wallowa bladderpod
Lesquerella occidentalis S. Wats.
  western bladderpod
Lunaria annua L.
  annual honesty
Nasturtium nasturtium-aquaticum (L.) Karsten
  = Rorippa nasturtium-aquaticum
Nasturtium officinale Ait. f.
  = Rorippa nasturtium-aquaticum
Neslia paniculata (L.) Desv.
  ballmustard
Phoenicaulis cheiranthoides Nutt.
  wallflower phoenicaulis
Physaria alpestris Suksdorf
  Washington twinpod
Physaria didymocarpa (Hook.) Gray
  common twinpod
Physaria didymocarpa var. didymocarpa (Hook.) Gray
  common twinpod
Physaria geyeri (Hook.) Gray
  Geyer's twinpod
Physaria geyeri var. geyeri (Hook.) Gray
  Geyer's twinpod
Physaria oregona S. Wats.
  Oregon twinpod
Radicula armoracia (L.) B.L. Robins.
  = Armoracia rusticana
Raphanus raphanistrum L.
  wild radish
Raphanus sativus L.
  wild radish
Rorippa columbiae (Suksdorf ex B.L. Robins.) Suksdorf ex T.J. Howell
  Columbian yellowcress
Rorippa curvipes Greene
  bluntleaf yellowcress
Rorippa curvipes var. curvipes Greene
  bluntleaf yellowcress
Rorippa curvipes var. truncata (Jepson) Rollins
Rorippa curvisiliqua (Hook.) Bess. ex Britt.
  curvepod yellowcress
Rorippa curvisiliqua var. curvisiliqua (Hook.) Bess. ex Britt.
  curvepod yellowcress
Rorippa curvisiliqua var. lyrata (Nutt.) M.E. Peck ex C.L. Hitchc.
  lyrateleaf yellowcress
Rorippa curvisiliqua var. nuttallii (S. Wats.) R. Stuckey
  Nuttall's yellowcress
Rorippa curvisiliqua var. orientalis R. Stuckey
  oriental yellowcress
Rorippa curvisiliqua var. procumbens R. Stuckey
  curvepod yellowcress
Rorippa nasturtium-aquaticum (L.) Hayek
  watercress
Rorippa palustris (L.) Bess.
  bog yellowcress
Rorippa palustris ssp. fernaldiana (Butters & Abbe) Jonsell
  Fernald's yellowcress
Rorippa palustris ssp. hispida (Desv.) Jonsell
  hispid yellowcress
Rorippa palustris ssp. occidentalis (S. Wats.) Abrams
  western bog yellowcress
Rorippa sinuata (Nutt.) A.S. Hitchc.
  spreading yellowcress
Rorippa sylvestris (L.) Bess.
  creeping yellowcress
Rorippa tenerrima Greene
  Modoc yellowcress
Rorippa teres (Michx.) R. Stuckey
  southern marsh yellowcress
Schoenocrambe linifolia (Nutt.) Greene
  flaxleaf plainsmustard
Sinapis alba L.
  white mustard
Sinapis arvensis L.
  charlock mustard
Sinapis nigra L.
  = Brassica nigra
Sisymbrium altissimum L.
  tall tumblemustard
Sisymbrium loeselii L.
  small tumbleweed mustard
Sisymbrium officinale (L.) Scop.
  hedgemustard
Smelowskia calycina (Steph. ex Willd.) C.A. Mey.
  alpine smelowskia
Smelowskia calycina var. americana (Regel & Herder) Drury & Rollins
  American false candytuft
Smelowskia ovalis M.E. Jones
  alpine false candytuft
Smelowskia ovalis var. ovalis M.E. Jones
  alpine false candytuft
Streptanthella longirostris (S. Wats.) Rydb.
  longbeak streptanthella
Subularia aquatica L.
  waterawlwort
Subularia aquatica var. americana (Mulligan & Calder) Boivin
  American waterawlwort
Teesdalia nudicaulis (L.) Ait. f.
  barestem teesdalia
Thelypodium integrifolium (Nutt.) Endl. ex Walp.
  entireleaved thelypody
Thelypodium integrifolium ssp. integrifolium (Nutt.) Endl. ex Walp.
  entireleaved thelypody
Thelypodium laciniatum (Hook.) Endl. ex Walp.
  cutleaf thelypody
Thelypodium milleflorum A. Nels.
  manyflower thelypody
Thelypodium sagittatum (Nutt. ex Torr. & Gray) Endl. ex Walp.
  arrow thelypody
Thelypodium sagittatum ssp. sagittatum (Nutt. ex Torr. & Gray) Endl. ex Walp.
  arrow thelypody
Thlaspi arvense L.
  field pennycress
Thlaspi montanum L.
  alpine pennycress
Thlaspi montanum var. montanum L.
  alpine pennycress
Thlaspi perfoliatum L.
  claspleaf pennycress
Thysanocarpus curvipes Hook.
  sand fringepod
Turritis 
  = Arabis 

CUCURBITACEAE
Echinocystis lobata (Michx.) Torr. & Gray
  wild cucumber
Marah oreganus (Torr. ex S. Wats.) T.J. Howell
  coastal manroot

CUPRESSACEAE
Chamaecyparis nootkatensis (D. Don) Spach
  Alaska cedar
Juniperus communis L.
  common juniper
Juniperus communis var. montana Ait.
  common juniper
Juniperus occidentalis Hook.
  western juniper
Juniperus occidentalis var. occidentalis Hook.
  western juniper
Juniperus scopulorum Sarg.
  Rocky Mountain juniper
Juniperus sibirica Burgsd.
  = Juniperus communis var. montana
Thuja plicata Donn ex D. Don
  western redcedar

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

DIPSACACEAE
Dipsacus fullonum L.
  Fuller's teasel

DROSERACEAE
Drosera anglica Huds.
  English sundew
Drosera rotundifolia L.
  roundleaf sundew

DRYOPTERIDACEAE
Athyrium americanum (Butters) Maxon
  alpine ladyfern
Athyrium filix-femina (L.) Roth
  common ladyfern
Athyrium filix-femina ssp. cyclosorum (Rupr.) C. Christens.
  subarctic ladyfern
Cystopteris fragilis (L.) Bernh.
  brittle bladderfern
Dryopteris arguta (Kaulfuss) Watt
  coastal woodfern
Dryopteris campyloptera Clarkson
  mountain woodfern
Dryopteris carthusiana (Vill.) H.P. Fuchs
  spinulose woodfern
Dryopteris cristata (L.) Gray
  crested woodfern
Dryopteris expansa (K. Presl) Fraser-Jenkins & Jermy
  spreading woodfern
Dryopteris filix-mas (L.) Schott
  male fern
Gymnocarpium disjunctum (Rupr.) Ching
  Pacific oakfern
Polystichum andersonii Hopkins
  Anderson's hollyfern
Polystichum californicum (D.C. Eat.) Diels
  California swordfern
Polystichum imbricans (D.C. Eat.) D.H. Wagner
  narrowleaf swordfern
Polystichum imbricans ssp. imbricans (D.C. Eat.) D.H. Wagner
  narrowleaf swordfern
Polystichum kruckebergii W.H. Wagner
  Kruckeberg's hollyfern
Polystichum lemmonii Underwood
  Lemmon's hollyfern
Polystichum lonchitis (L.) Roth
  northern hollyfern
Polystichum munitum (Kaulfuss) K. Presl
  western swordfern
Polystichum scopulinum (D.C. Eat.) Maxon
  mountain hollyfern
Woodsia oregana D.C. Eat.
  Oregon woodsia
Woodsia oregana ssp. oregana D.C. Eat.
  Oregon cliff fern
Woodsia scopulina D.C. Eat.
  Rocky Mountain woodsia

ELAEAGNACEAE
Shepherdia canadensis (L.) Nutt.
  russet buffaloberry

ELATINACEAE
Bergia texana (Hook.) Seub. ex Walp.
  Texas bergia
Elatine americana (Pursh) Arn.
  American waterwort
Elatine brachysperma Gray
  shortseed waterwort
Elatine californica Gray
  California waterwort
Elatine triandra Schkuhr
  threestamen waterwort

EMPETRACEAE
Empetrum nigrum L.
  black crowberry
Empetrum nigrum ssp. hermaphroditum (Lange ex Hagerup) Bocher
  black crowberry

EQUISETACEAE
Equisetum X ferrissii Clute (pro sp.)
  Ferriss' horsetail
Equisetum X mackaii (Newm.) Brichan
  MacKai's horsetail
Equisetum arvense L.
  field horsetail
Equisetum fluviatile L.
  water horsetail
Equisetum hyemale L.
  scouringrush horsetail
Equisetum hyemale var. affine (Engelm.) A.A. Eat.
  scouringrush horsetail
Equisetum laevigatum A. Braun
  smooth horsetail
Equisetum palustre L.
  marsh horsetail
Equisetum scirpoides Michx.
  dwarf scouringrush
Equisetum sylvaticum L.
  woodland horsetail
Equisetum telmateia Ehrh.
  giant horsetail
Equisetum telmateia var. braunii (Milde) Milde
  giant horsetail
Equisetum variegatum Schleich. ex F. Weber & D.M.H. Mohr
  variegated scouringrush
Equisetum variegatum var. alaskanum A.A. Eat.
  Alaskan scouringrush
Equisetum variegatum var. variegatum Schleich. ex F. Weber & D.M.H. Mohr
  variegated scouringrush

ERICACEAE
Andromeda polifolia L.
  bog rosemary
Arbutus menziesii Pursh
  Pacific madrone
Arctostaphylos X media Greene (pro sp.)
  intermediate manzanita
Arctostaphylos columbiana Piper
  hairy manzanita
Arctostaphylos nevadensis Gray
  pinemat manzanita
Arctostaphylos nevadensis ssp. nevadensis Gray
  pinemat manzanita
Arctostaphylos patula Greene
  greenleaf manzanita
Arctostaphylos pungens ssp. nevadensis (Gray) J.B. Roof
  = Arctostaphylos nevadensis
Arctostaphylos uva-ursi (L.) Spreng.
  kinnikinnick
Cassiope lycopodioides (Pallas) D. Don
  clubmoss mountain heather
Cassiope lycopodioides var. cristapilosa (Calder & Taylor) Boivin
  clubmoss mountain heather
Cassiope mertensiana (Bong.) D. Don
  western moss heather
Cassiope mertensiana var. mertensiana (Bong.) D. Don
  western moss heather
Cassiope tetragona (L.) D. Don
  white arctic mountain heather
Cassiope tetragona var. saximontana (Small) C.L. Hitchc.
  white arctic mountain heather
Chimaphila menziesii (R. Br. ex D. Don) Spreng.
  little prince's pine
Chimaphila umbellata (L.) W. Bart.
  pipsissewa
Chimaphila umbellata ssp. occidentalis (Rydb.) Hulten
  pipsissewa
Elliottia pyroliflorus (Bong.) S.W. Brim & P.F. Stevens
  copperbush
Gaultheria hispidula (L.) Muhl. ex Bigelow
  creeping snowberry
Gaultheria humifusa (Graham) Rydb.
  alpine spicywintergreen
Gaultheria ovatifolia Gray
  western teaberry
Gaultheria shallon Pursh
  salal
Harrimanella stelleriana (Pallas) Coville
  Alaska bellheather
Kalmia microphylla (Hook.) Heller
  alpine laurel
Kalmia polifolia ssp. microphylla (Hook.) Calder & Taylor
  = Kalmia microphylla
Ledum X columbianum Piper (pro sp.)
  coast Labradortea
Ledum glandulosum Nutt.
  Western Labradortea
Ledum groenlandicum Oeder
  bog Labradortea
Ledum palustre ssp. groenlandicum (Oeder) Hulten
  = Ledum groenlandicum
Loiseleuria procumbens (L.) Desv.
  alpine azalea
Menziesia ferruginea Sm.
  rusty menziesia
Moneses uniflora (L.) Gray
  single delight
Moneses uniflora ssp. reticulata (Nutt.) Calder & Taylor
  single delight
Moneses uniflora ssp. uniflora (L.) Gray
  oneflowered woodnymph
Orthilia secunda (L.) House
  sidebells wintergreen
Oxycoccus 
  = Vaccinium 
Phyllodoce X intermedia (Hook.) Rydb. (pro sp.)
  hybrid mountainheath
Phyllodoce empetriformis (Sm.) D. Don
  pink mountainheath
Phyllodoce glanduliflora (Hook.) Coville
  yellow mountainheath
Pyrola asarifolia Michx.
  liverleaf wintergreen
Pyrola asarifolia ssp. asarifolia Michx.
  liverleaf wintergreen
Pyrola asarifolia ssp. bracteata (Hook.) Haber
  pink wintergreen
Pyrola chlorantha Sw.
  greenflowered wintergreen
Pyrola minor L.
  snowline wintergreen
Pyrola pallida Greene
  = Pyrola picta
Pyrola picta Sm.
  whiteveined wintergreen
Pyrola rotundifolia ssp. asarifolia (Michx.) A.& D. Love
  = Pyrola asarifolia ssp. asarifolia
Pyrola secunda L.
  = Orthilia secunda
Pyrola uliginosa Torr. & Gray ex Torr.
  = Pyrola asarifolia ssp. asarifolia
Pyrola uniflora L.
  = Moneses uniflora ssp. uniflora
Pyrola virens Schreb.
  = Pyrola chlorantha
Rhododendron albiflorum Hook.
  Cascade azalea
Rhododendron macrophyllum D. Don ex G. Don
  Pacific rhododendron
Vaccinium cespitosum Michx.
  dwarf blueberry
Vaccinium deliciosum Piper
  blueleaved huckleberry
Vaccinium macrocarpon Ait.
  cranberry
Vaccinium membranaceum Dougl. ex Torr.
  blue huckleberry
Vaccinium myrtilloides Michx.
  velvetleaf huckleberry
Vaccinium myrtillus L.
  whortleberry
Vaccinium ovalifolium Sm.
  ovalleaf blueberry
Vaccinium ovatum Pursh
  evergreen huckleberry
Vaccinium ovatum var. ovatum Pursh
  evergreen huckleberry
Vaccinium ovatum var. saporosum Jepson
  evergreen huckleberry
Vaccinium oxycoccos L.
  small cranberry
Vaccinium parvifolium Sm.
  red huckleberry
Vaccinium scoparium Leib. ex Coville
  grouse whortleberry
Vaccinium uliginosum L.
  bog blueberry

EUPHORBIACEAE
Chamaesyce glyptosperma (Engelm.) Small
  ribseed sandmat
Chamaesyce maculata (L.) Small
  spotted sandmat
Chamaesyce serpyllifolia (Pers.) Small
  thymeleaf sandmat
Chamaesyce serpyllifolia ssp. serpyllifolia (Pers.) Small
  thymeleaf sandmat
Croton setigerus Hook.
  croton
Eremocarpus setigerus (Hook.) Benth.
  = Croton setigerus
Euphorbia cyparissias L.
  cypress spurge
Euphorbia esula L.
  wolf's milk
Euphorbia glyptosperma Engelm.
  = Chamaesyce glyptosperma
Euphorbia helioscopia L.
  madwoman's milk
Euphorbia lathyris L.
  moleplant
Euphorbia maculata L.
  = Chamaesyce maculata
Euphorbia neomexicana Greene
  = Chamaesyce serpyllifolia ssp. serpyllifolia
Euphorbia peplus L.
  petty spurge
Euphorbia serpyllifolia Pers.
  = Chamaesyce serpyllifolia ssp. serpyllifolia
Euphorbia spathulata Lam.
  warty spurge
Euphorbia supina Raf.
  = Chamaesyce maculata

FAGACEAE
Castanopsis chrysophylla (Dougl. ex Hook.) A. DC.
  = Chrysolepis chrysophylla var. chrysophylla
Chrysolepis chrysophylla (Dougl. ex Hook.) Hjelmqvist
Chrysolepis chrysophylla var. chrysophylla (Dougl. ex Hook.) Hjelmqvist
Quercus garryana Dougl. ex Hook.
  Oregon white oak
Quercus garryana var. garryana Dougl. ex Hook.
  Oregon white oak

FUMARIACEAE
Corydalis aquae-gelidae M.E. Peck & Wilson
  coldwater fumewort
Corydalis aurea Willd.
  scrambledeggs
Corydalis aurea ssp. aurea Willd.
  scrambledeggs
Corydalis scouleri Hook.
  Scouler's fumewort
Dicentra cucullaria (L.) Bernh.
  dutchman's breeches
Dicentra formosa (Haw.) Walp.
  Pacific bleedinghearts
Dicentra formosa ssp. formosa (Haw.) Walp.
  Pacific bleedinghearts
Dicentra uniflora Kellogg
  longhorn steershead
Fumaria officinalis L.
  drug fumitory

GARRYACEAE
Garrya fremontii Torr.
  silk tassel

GENTIANACEAE
Amarella .
  = Gentianella amarella ssp. acuta
Centaurium erythraea Rafn
  European centaury
Centaurium exaltatum (Griseb.) W. Wight ex Piper
  desert centaury
Centaurium minus auct. non Moench
  = Centaurium erythraea
Centaurium muehlenbergii (Griseb.) W. Wight ex Piper
  Muhlenberg's centaury
Cicendia exaltata Griseb.
  = Centaurium exaltatum
Erythraea centaurium of authors
  = Centaurium erythraea
Frasera albicaulis Dougl. ex Griseb.
  whitestem elkweed
Frasera albicaulis var. albicaulis Dougl. ex Griseb.
  whitestem elkweed
Frasera albicaulis var. columbiana (St. John) C.L. Hitchc.
  whitestem elkweed
Frasera albicaulis var. nitida (Benth.) C.L. Hitchc.
  whitestem elkweed
Frasera fastigiata (Pursh) Heller
  clustered elkweed
Frasera speciosa Dougl. ex Griseb.
  green gentian
Gentiana affinis Griseb.
  pleated gentian
Gentiana amarella L. auct. p.p.
  = Gentianella amarella ssp. acuta
Gentiana calycosa Griseb.
  Rainier pleated gentian
Gentiana douglasiana Bong.
  swamp gentian
Gentiana forwoodii Gray
  = Gentiana affinis
Gentiana glauca Pallas
  pale gentian
Gentiana oregana Engelm. ex Gray
  = Gentiana affinis
Gentiana parryi Engelm.
  Parry's gentian
Gentiana plebeja Ledeb. ex Spreng.
  = Gentianella amarella ssp. acuta
Gentiana rusbyi Greene
  = Gentiana affinis
Gentiana sceptrum Griseb.
  king's scepter gentian
Gentiana tenella Rottb.
  = Gentianella tenella ssp. tenella
Gentianella amarella (L.) Boerner
  autumn dwarfgentian
Gentianella amarella ssp. acuta (Michx.) J. Gillett
  autumn dwarfgentian
Gentianella tenella (Rottb.) Boerner
  Dane's dwarfgentian
Gentianella tenella ssp. tenella (Rottb.) Boerner
  Dane's dwarfgentian
Swertia albicaulis (Dougl. ex Griseb.) Kuntze
  = Frasera albicaulis var. albicaulis
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
Geranium bicknellii Britt.
  Bicknell's cranesbill
Geranium bicknellii var. longipes (S. Wats.) Fern.
  northern cranesbill
Geranium carolinianum L.
  Carolina geranium
Geranium carolinianum var. carolinianum L.
  Carolina geranium
Geranium carolinianum var. sphaerospermum (Fern.) Breitung
  Carolina geranium
Geranium columbinum L.
  longstalk cranesbill
Geranium dissectum L.
  cutleaf geranium
Geranium molle L.
  dovefoot geranium
Geranium oreganum T.J. Howell
  Oregon geranium
Geranium pusillum L.
  small geranium
Geranium richardsonii Fisch. & Trautv.
  Richardson's geranium
Geranium robertianum L.
  Robert geranium
Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey.
  sticky geranium
Geranium viscosissimum var. nervosum (Rydb.) C.L. Hitchc.
  sticky purple geranium
Geranium viscosissimum var. viscosissimum Fisch. & C.A. Mey. ex C.A. Mey.
  sticky purple geranium

GROSSULARIACEAE
Grossularia 
  = Ribes 
Ribes acerifolium T.J. Howell
  mapleleaf currant
Ribes aureum Pursh
  golden currant
Ribes aureum var. aureum Pursh
  golden currant
Ribes bracteosum Dougl. ex Hook.
  stink currant
Ribes cereum Dougl.
  wax currant
Ribes cereum var. cereum Dougl.
  wax currant
Ribes cereum var. colubrinum C.L. Hitchc.
  wax currant
Ribes divaricatum Dougl.
  spreading gooseberry
Ribes divaricatum var. divaricatum Dougl.
  coastal black gooseberry
Ribes hudsonianum Richards.
  northern black currant
Ribes hudsonianum var. hudsonianum Richards.
  Hudson Bay currant
Ribes hudsonianum var. petiolare (Dougl.) Jancz.
  western black currant
Ribes inerme Rydb.
  whitestem gooseberry
Ribes inerme var. inerme Rydb.
  whitestem gooseberry
Ribes lacustre (Pers.) Poir.
  prickly currant
Ribes laxiflorum Pursh
  trailing black currant
Ribes lobbii Gray
  gummy gooseberry
Ribes montigenum McClatchie
  gooseberry currant
Ribes niveum Lindl.
  snow currant
Ribes oxyacanthoides L.
  Canadian gooseberry
Ribes oxyacanthoides ssp. cognatum (Greene) Sinnott
  stream currant
Ribes oxyacanthoides ssp. irriguum (Dougl.) Sinnott
  Idaho gooseberry
Ribes rubrum L.
  cultivated currant
Ribes sanguineum Pursh
  redflower currant
Ribes sanguineum var. sanguineum Pursh
  redflower currant
Ribes triste Pallas
  red currant
Ribes velutinum Greene
  desert gooseberry
Ribes velutinum var. gooddingii (M.E. Peck) C.L. Hitchc.
  Gooding's gooseberry
Ribes viscosissimum Pursh
  sticky currant
Ribes viscosissimum var. viscosissimum Pursh
  sticky currant
Ribes watsonianum Koehne
  spring gooseberry
Ribes wolfii Rothrock
  Wolf's currant

HALORAGACEAE
Myriophyllum hippuroides Nutt. ex Torr. & Gray
  western watermilfoil
Myriophyllum sibiricum Komarov
  shortspike watermilfoil
Myriophyllum verticillatum L.
  whorlleaf watermilfoil

HIPPURIDACEAE
Hippuris montana Ledeb.
  mountain marestail
Hippuris vulgaris L.
  common marestail

HYDRANGEACEAE
Philadelphus confusus Piper
  Piper's mockorange
Philadelphus lewisii Pursh
  Lewis' mockorange
Philadelphus lewisii var. angustifolius (Rydb.) Hu
  Lewis' mockorange
Philadelphus lewisii var. ellipticus Hu
  Lewis' mockorange
Philadelphus lewisii var. gordonianus (Lindl.) Jepson
  Gordon's mockorange
Philadelphus lewisii var. helleri (Rydb.) Hu
  Heller's mockorange
Philadelphus lewisii var. lewisii Pursh
  Lewis' mockorange
Philadelphus lewisii var. oblongifolius Hu
  Lewis' mockorange
Philadelphus lewisii var. platyphyllus (Rydb.) Hu
  Lewis' mockorange
Philadelphus trichothecus Hu
  Columbian mockorange
Philadelphus zelleri Hu
  Zeller's mockorange
Whipplea modesta Torr.
  common whipplea

HYDROCHARITACEAE
Egeria densa Planch.
  Brazilian waterweed
Elodea canadensis Michx.
  Canadian waterweed
Elodea nuttallii (Planch.) St. John
  western waterweed
Philotria 
  = Elodea 
Vallisneria americana Michx.
  American eelgrass

HYDROPHYLLACEAE
Hesperochiron californicus (Benth.) S. Wats.
  California hesperochiron
Hesperochiron pumilus (Dougl. ex Griseb.) Porter
  dwarf hesperochiron
Hydrophyllum capitatum Dougl. ex Benth.
  ballhead waterleaf
Hydrophyllum capitatum var. capitatum Dougl. ex Benth.
  ballhead waterleaf
Hydrophyllum capitatum var. thompsonii (M.E. Peck) Constance
  Thompson's waterleaf
Hydrophyllum fendleri (Gray) Heller
  Fendler's waterleaf
Hydrophyllum fendleri var. albifrons (Heller) J.F. Macbr.
  white waterleaf
Hydrophyllum fendleri var. fendleri (Gray) Heller
  Fendler's waterleaf
Hydrophyllum tenuipes Heller
  Pacific waterleaf
Nama aretioides (Hook. & Arn.) Brand
  ground nama
Nama densum J.G. Lemmon
  leafy nama
Nama densum var. parviflorum (Greenm.) C.L. Hitchc.
  leafy fiddleleaf
Nemophila breviflora Gray
  basin nemophila
Nemophila kirtleyi Henderson
  Kirtley's nemophila
Nemophila parviflora Dougl. ex Benth.
  smallflower nemophila
Nemophila parviflora var. austiniae (Eastw.) Brand
  groovelover
Nemophila parviflora var. parviflora Dougl. ex Benth.
  groovelover
Nemophila pedunculata Dougl. ex Benth.
  littlefoot nemophila
Phacelia bolanderi Gray
  Bolander's scorpionweed
Phacelia franklinii (R. Br.) Gray
  Franklin's phacelia
Phacelia glandulifera Piper
Phacelia hastata Dougl. ex Lehm.
  silverleaf phacelia
Phacelia hastata var. hastata Dougl. ex Lehm.
  silverleaf phacelia
Phacelia heterophylla Pursh
  varileaf phacelia
Phacelia heterophylla ssp. heterophylla Pursh
  varileaf phacelia
Phacelia heterophylla ssp. virgata (Greene) Heckard
  varileaf phacelia
Phacelia humilis Torr. & Gray
  low scorpionweed
Phacelia humilis var. humilis Torr. & Gray
  low scorpionweed
Phacelia ivesiana Torr.
  Ives' phacelia
Phacelia lenta Piper
  sticky scorpionweed
Phacelia leptosepala Rydb.
  narrowsepal scorpionweed
Phacelia linearis (Pursh) Holz.
  threadleaf phacelia
Phacelia minutissima Henderson
  small phacelia
Phacelia mutabilis Greene
  changeable scorpionweed
Phacelia nemoralis Greene
  shade scorpionweed
Phacelia nemoralis ssp. oregonensis Heckard
  Oregon scorpionweed
Phacelia procera Gray
  mountain phacelia
Phacelia ramosissima Dougl. ex Lehm.
  branching phacelia
Phacelia ramosissima var. ramosissima Dougl. ex Lehm.
  branching phacelia
Phacelia sericea (Graham) Gray
  silky phacelia
Phacelia sericea ssp. sericea (Graham) Gray
  purplefringe
Phacelia tetramera J.T. Howell
  fourpart scorpionweed
Romanzoffia sitchensis Bong.
  Sitka mistmaiden
Romanzoffia tracyi Jepson
  Tracy's mistmaiden

IRIDACEAE
Iris missouriensis Nutt.
  Rocky Mountain iris
Iris pseudacorus L.
  paleyellow iris
Iris tenax Dougl. ex Lindl.
  toughleaf iris
Iris tenax ssp. tenax Dougl. ex Lindl.
  toughleaf iris
Olsynium douglasii (A. Dietr.) Bickn.
  Douglas' olsynium
Olsynium douglasii var. douglasii (A. Dietr.) Bickn.
  Douglas' olsynium
Olsynium douglasii var. inflatum (Suksdorf) Cholewa & D. Henderson
  inflated olsynium
Sisyrinchium angustifolium P. Mill.
  narrowleaf blueeyed grass
Sisyrinchium californicum (Ker-Gawl. ex Sims) Ait.
  golden blueeyed grass
Sisyrinchium douglasii var. douglasii A. Dietr.
  grasswidows
Sisyrinchium idahoense Bickn.
  Idaho blueeyed grass
Sisyrinchium idahoense var. idahoense Bickn.
  Idaho blueeyed grass
Sisyrinchium idahoense var. macounii (Bickn.) D. Henderson
  Macoun's blueeyed grass
Sisyrinchium idahoense var. occidentale (Bickn.) D. Henderson
  Idaho blueeyed grass
Sisyrinchium idahoense var. segetum (Bickn.) D. Henderson
  Idaho blueeyed grass
Sisyrinchium littorale Greene
  Alaska blueeyed grass
Sisyrinchium sarmentosum Suksdorf ex Greene
  mountain blueeyed grass
Sisyrinchium septentrionale Bickn.
  northern blueeyed grass

ISOETACEAE
Isoetes bolanderi Engelm.
  Bolander's quillwort
Isoetes bolanderi var. bolanderi Engelm.
  Bolander's quillwort
Isoetes howellii Engelm.
  Howell's quillwort
Isoetes lacustris L.
  lake quillwort
Isoetes maritima Underwood
  maritime quillwort
Isoetes nuttallii A. Braun ex Engelm.
  Nuttall's quillwort
Isoetes occidentalis Henderson
  western quillwort

LABIATAE
Acinos arvensis (Lam.) Dandy
  basil thyme
Agastache occidentalis (Piper) Heller
  western giant hyssop
Agastache urticifolia (Benth.) Kuntze
  nettleleaf giant hyssop
Agastache urticifolia var. urticifolia (Benth.) Kuntze
  nettleleaf giant hyssop
Ajuga reptans L.
  common bugle
Dracocephalum parviflorum Nutt.
  American dragonhead
Galeopsis tetrahit L.
  brittlestem hempnettle
Glechoma hederacea L.
  groundivy
Glechoma hederacea var. hederacea L.
  groundivy
Lamium amplexicaule L.
  henbit deadnettle
Lamium maculatum L.
  spotted henbit
Lamium purpureum L.
  purple deadnettle
Leonurus cardiaca L.
  common motherwort
Lycopus americanus Muhl. ex W. Bart.
  American waterhorehound
Lycopus asper Greene
  rough bugleweed
Lycopus lucidus var. americanus Gray
  = Lycopus asper
Lycopus uniflorus Michx.
  northern bugleweed
Marrubium vulgare L.
  horehound
Melissa officinalis L.
  common balm
Mentha X piperita L. (pro sp.)
  peppermint
Mentha X villosa Huds. (pro sp.)
  hairy mint
Mentha aquatica L.
  water mint
Mentha arvensis var. canadensis (L.) Kuntze
  = Mentha canadensis
Mentha canadensis L.
  Canadian mint
Mentha citrata Ehrh.
  = Mentha aquatica
Mentha piperita ssp. citrata (Ehrh.) Briq.
  = Mentha aquatica
Mentha pulegium L.
  pennyroyal
Mentha spicata L.
  spearmint
Mentha viridis L.
  = Mentha spicata
Micromeria chamissonis (Benth.) Greene
  = Satureja douglasii
Moldavica parviflora (Nutt.) Britt.
  = Dracocephalum parviflorum
Monarda didyma L.
  scarlet beebalm
Monardella odoratissima Benth.
  Pacific monardella
Monardella odoratissima ssp. discolor (Greene) Epling
  alpine mountainbalm
Monardella odoratissima ssp. odoratissima Benth.
  alpine mountainbalm
Nepeta cataria L.
  catnip
Physostegia parviflora Nutt. ex Gray
  western false dragonhead
Prunella vulgaris L.
  common selfheal
Prunella vulgaris ssp. lanceolata (W. Bart.) Hulten
  lance selfheal
Prunella vulgaris ssp. vulgaris L.
  common selfheal
Salvia aethiopis L.
  Mediterranean sage
Salvia carnosa Dougl. ex Greene
  = Salvia dorrii ssp. dorrii var. incana
Salvia dorrii (Kellogg) Abrams
  grayball sage
Salvia dorrii ssp. dorrii (Kellogg) Abrams
  Dorr's sage
Salvia dorrii ssp. dorrii var. incana (Benth.) Strachan
  purple sage
Salvia glutinosa L.
  sticky sage
Salvia pratensis L.
  introduced sage
Salvia sclarea L.
  sclary sage
Satureja douglasii (Benth.) Briq.
  yerba buena
Scutellaria angustifolia Pursh
  narrowleaf skullcap
Scutellaria antirrhinoides Benth.
  nose skullcap
Scutellaria epilobiifolia A. Hamilton
  = Scutellaria galericulata
Scutellaria galericulata L.
  marsh skullcap
Scutellaria lateriflora L.
  blue skullcap
Scutellaria lateriflora var. lateriflora L.
  blue skullcap
Stachys ajugoides Benth.
  bugle hedgenettle
Stachys ajugoides var. rigida Jepson & Hoover
Stachys cooleyae Heller
Stachys palustris L.
  marsh hedgenettle
Stachys palustris ssp. pilosa (Nutt.) Epling
  marsh hedgenettle
Stachys rigida Nutt. ex Benth.
  = Stachys palustris ssp. pilosa
Teucrium canadense L.
  Candad germander
Teucrium canadense var. occidentale (Gray) McClintock & Epling
  western germander
Thymus praecox Opiz
  mother of thyme
Thymus praecox ssp. arcticus (Dur.) Jalas
  creeping thyme
Thymus serpyllum auct. non L.
  = Thymus praecox ssp. arcticus
Trichostema lanceolatum Benth.
  vinegarweed
Trichostema oblongum Benth.
  oblong bluecurls

LEGUMINOSAE
Alhagi camelorum Fisch.
  = Alhagi maurorum
Alhagi maurorum Medik.
  camelthorn
Astragalus adsurgens Pallas
  standing milkvetch
Astragalus adsurgens var. robustior Hook.
  prairie milkvetch
Astragalus agrestis Dougl. ex G. Don
  purple milkvetch
Astragalus alpinus L.
  alpine milkvetch
Astragalus alpinus var. alpinus L.
  alpine milkvetch
Astragalus arrectus Gray
  Palouse milkvetch
Astragalus arthurii M.E. Jones
  waha milkvetch
Astragalus beckwithii Torr. & Gray
  Beckwith's milkvetch
Astragalus beckwithii var. weiserensis M.E. Jones
  Weiser's milkvetch
Astragalus canadensis L.
  Canadian milkvetch
Astragalus canadensis var. brevidens (Gandog.) Barneby
  shorttooth Canadian milkvetch
Astragalus canadensis var. canadensis L.
  Canadian milkvetch
Astragalus canadensis var. mortonii (Nutt.) S. Wats.
  Morton's Canadian milkvetch
Astragalus caricinus (M.E. Jones) Barneby
  buckwheat milkvetch
Astragalus cicer L.
  cicer milkvetch
Astragalus collinus (Hook.) Dougl. ex G. Don
  hillside milkvetch
Astragalus collinus var. collinus (Hook.) Dougl. ex G. Don
  hillside milkvetch
Astragalus columbianus Barneby
  Columbian milkvetch
Astragalus cottonii M.E. Jones
  Cotton's milkvetch
Astragalus cusickii Gray
  Cusick's milkvetch
Astragalus cusickii var. cusickii Gray
  Cusick's milkvetch
Astragalus falcatus Lam.
  Russian milkvetch
Astragalus filipes Torr. ex Gray
  threadstalk milkvetch
Astragalus geyeri Gray
  Geyer's milkvetch
Astragalus geyeri var. geyeri Gray
  Geyer's milkvetch
Astragalus hoodianus T.J. Howell
  Hood River milkvetch
Astragalus inflexus Dougl. ex Hook.
  bent milkvetch
Astragalus leibergii M.E. Jones
  Leiberg's milkvetch
Astragalus lentiginosus Dougl. ex Hook.
  specklepod milkvetch
Astragalus lentiginosus var. lentiginosus Dougl. ex Hook.
  speckledpod milkvetch
Astragalus lyallii Gray
  Lyall's milkvetch
Astragalus microcystis Gray
  dwarf milkvetch
Astragalus misellus S. Wats.
  pauper milkvetch
Astragalus misellus var. pauper Barneby
  pauper milkvetch
Astragalus miser Dougl.
  weedy milkvetch
Astragalus miser var. miser Dougl.
  timber milkvetch
Astragalus miser var. serotinus (Gray ex Cooper) Barneby
  timber milkvetch
Astragalus mulfordiae M.E. Jones
  Mulford's milkvetch
Astragalus pulsiferae Gray
  Ames' milkvetch
Astragalus pulsiferae var. suksdorfii (T.J. Howell) Barneby
  Suksdorf's milkvetch
Astragalus purshii Dougl. ex Hook.
  woollypod milkvetch
Astragalus purshii var. glareosus (Dougl. ex Hook.) Barneby
  gravel milkvetch
Astragalus purshii var. purshii Dougl. ex Hook.
  Pursh's milkvetch
Astragalus purshii var. tinctus M.E. Jones
  woollypod milkvetch
Astragalus reventiformis (Rydb.) Barneby
  Yakima milkvetch
Astragalus reventus Gray
  Blue Mountain milkvetch
Astragalus riparius Barneby
  woodyroot milkvetch
Astragalus robbinsii (Oakes) Gray
  Robbins' milkvetch
Astragalus robbinsii var. minor (Hook.) Barneby
  Robbins' milkvetch
Astragalus sclerocarpus Gray
  woodypod milkvetch
Astragalus sheldonii (Rydb.) Barneby
  Sheldon's milkvetch
Astragalus sinuatus Piper
  Whited's milkvetch
Astragalus spaldingii Gray
  Spalding's milkvetch
Astragalus speirocarpus Gray
  threadstalk milkvetch
Astragalus succumbens Dougl. ex Hook.
  Columbia milkvetch
Astragalus tweedyi Canby
  Tweedy's milkvetch
Astragalus whitneyi Gray
  balloon pod milkvetch
Astragalus whitneyi var. sonneanus (Greene) Jepson
  balloon pod milkvetch
Cytisus multiflorus (L'Her.) Sweet
  white spanishbroom
Cytisus scoparius (L.) Link
  scotchbroom
Cytisus scoparius var. scoparius (L.) Link
  scotchbroom
Dalea ornata (Dougl. ex Hook.) Eat. & J. Wright
  Blue Mountain prairieclover
Genista monspessulana (L.) L. Johnson
  frenchbroom
Glycyrrhiza lepidota Pursh
  American licorice
Hedysarum occidentale Greene
  western sweetvetch
Hedysarum sulphurescens Rydb.
  white sweetvetch
Lathyrus aphaca L.
  yellow peavine
Lathyrus bijugatus White
  drypark peavine
Lathyrus holochlorus (Piper) C.L. Hitchc.
  thinleaf peavine
Lathyrus japonicus Willd.
  sea peavine
Lathyrus japonicus var. maritimus (L.) Kartesz & Gandhi
  sea peavine
Lathyrus lanszwertii Kellogg
  thickleaf peavine
Lathyrus lanszwertii var. aridus (Piper) Jepson
  Nevada peavine
Lathyrus lanszwertii var. lanszwertii Kellogg
  Lanszwert's peavine
Lathyrus latifolius L.
  perennial peavine
Lathyrus littoralis (Nutt.) Endl.
  silky beach peavine
Lathyrus nevadensis S. Wats.
  Sierran peavine
Lathyrus nevadensis ssp. cusickii (S. Wats.) C.L. Hitchc.
  Cusick's peavine
Lathyrus nevadensis ssp. lanceolatus (T.J. Howell) C.L. Hitchc.
  Sierran peavine
Lathyrus nevadensis ssp. lanceolatus var. nuttallii (S. Wats.) C.L. Hitchc.
  Nuttall's peavine
Lathyrus nevadensis ssp. lanceolatus var. pilosellus (M.E. Peck) C.L. Hitchc.
  Sierran peavine
Lathyrus nevadensis ssp. lanceolatus var. puniceus C.L. Hitchc.
  Sierran peavine
Lathyrus ochroleucus Hook.
  cream peavine
Lathyrus palustris L.
  slenderstem peavine
Lathyrus pauciflorus Fern.
  fewflower peavine
Lathyrus pauciflorus var. pauciflorus Fern.
  fewflower peavine
Lathyrus pauciflorus var. utahensis (M.E. Jones) Piper ex M.E. Peck
  Utah peavine
Lathyrus polyphyllus Nutt.
  leafy peavine
Lathyrus pratensis L.
  meadow peavine
Lathyrus sylvestris L.
  flat peavine
Lathyrus tuberosus L.
  tuberous sweetpea
Lathyrus vestitus Nutt.
  Pacific peavine
Lathyrus vestitus ssp. bolanderi (S. Wats.) C.L. Hitchc.
  Bolander's peavine
Lotus aboriginus Jepson
  rosy birdsfoot trefoil
Lotus corniculatus L.
  birdfoot deervetch
Lotus crassifolius (Benth.) Greene
  big deervetch
Lotus crassifolius var. crassifolius (Benth.) Greene
  big deervetch
Lotus denticulatus (E. Drew) Greene
  riverbar birdsfoot trefoil
Lotus formosissimus Greene
  seaside birdsfoot trefoil
Lotus micranthus Benth.
  desert deervetch
Lotus nevadensis (S. Wats.) Greene
  Nevada birdsfoot trefoil
Lotus nevadensis var. douglasii (Greene) Ottley
  Douglas' birdsfoot trefoil
Lotus parviflorus Desf.
  smallflower birdsfoot trefoil
Lotus pinnatus Hook.
  meadow birdsfoot trefoil
Lotus unifoliolatus (Hook.) Benth.
  American birdsfoot trefoil
Lotus unifoliolatus var. unifoliolatus (Hook.) Benth.
  prairie trefoil
Lupinus albicaulis Dougl.
  sicklekeel lupine
Lupinus albicaulis var. albicaulis Dougl.
  sicklekeel lupine
Lupinus alpicola Henderson ex Piper
  Mt. Adams lupine
Lupinus arboreus Sims
  bush lupine
Lupinus arboreus var. arboreus Sims
  bush lupine
Lupinus arbustus Dougl. ex Lindl.
  longspur lupine
Lupinus arbustus ssp. arbustus Dougl. ex Lindl.
  longspur lupine
Lupinus arbustus ssp. arbustus var. montanus (T.J. Howell) D. Dunn
  longspur lupine
Lupinus arbustus ssp. calcaratus (Kellogg) D. Dunn
  quakerbonnet lupine
Lupinus arbustus ssp. neolaxiflorus D. Dunn
  longspur lupine
Lupinus arbustus ssp. pseudoparviflorus (Rydb.) D. Dunn
  false lupine
Lupinus arcticus S. Wats.
  arctic lupine
Lupinus arcticus ssp. arcticus S. Wats.
  arctic lupine
Lupinus arcticus ssp. subalpinus (Piper & B.L. Robins.) D. Dunn
  subalpine lupine
Lupinus argenteus Pursh
  silvery lupine
Lupinus argenteus ssp. argenteus Pursh
  silvery lupine
Lupinus argenteus ssp. argenteus var. argenteus Pursh
  silvery lupine
Lupinus argenteus ssp. argenteus var. laxiflorus (Dougl. ex Lindl.) Dorn
  spur lupine
Lupinus aridus Dougl.
  desert lupine
Lupinus aridus ssp. aridus Dougl.
  desert lupine
Lupinus bicolor Lindl.
  bicolor lupine
Lupinus bicolor ssp. bicolor Lindl.
  bicolor lupine
Lupinus bicolor ssp. tridentatus (Eastw. ex C.P. Sm.) D. Dunn
  annual lupine
Lupinus bicolor ssp. tridentatus var. tridentatus Eastw. ex C.P. Sm.
  annual lupine
Lupinus bingenensis Suksdorf
  Bingen lupine
Lupinus bingenensis var. bingenensis Suksdorf
  Bingen lupine
Lupinus bingenensis var. dubius C.P. Sm.
  Bingen lupine
Lupinus bingenensis var. subsaccatus Suksdorf
  Bingen lupine
Lupinus burkei S. Wats.
  largeleaf lupine
Lupinus burkei ssp. burkei S. Wats.
  Burke's lupine
Lupinus cusickii S. Wats.
  Cusick's lupine
Lupinus cusickii ssp. cusickii S. Wats.
  Cusick's lupine
Lupinus densiflorus Benth.
  whitewhorl lupine
Lupinus densiflorus var. densiflorus Benth.
  whitewhorl lupine
Lupinus garfieldensis C.P. Sm.
  Garfield lupine
Lupinus holosericeus Nutt.
  holo lupine
Lupinus latifolius Lindl. ex J.G. Agardh
  broadleaf lupine
Lupinus latifolius ssp. latifolius Lindl. ex J.G. Agardh
  broadleaf lupine
Lupinus lepidus Dougl. ex Lindl.
  Pacific lupine
Lupinus leucophyllus Dougl. ex Lindl.
  velvet lupine
Lupinus leucophyllus ssp. erectus (Henderson) Harmon
  velvet lupine
Lupinus leucophyllus ssp. leucophyllus Dougl. ex Lindl.
  velvet lupine
Lupinus leucophyllus ssp. leucophyllus var. belliae C.P. Sm.
  velvet lupine
Lupinus leucophyllus ssp. leucophyllus var. canescens (T.J. Howell) C.P. Sm.
  velvet lupine
Lupinus leucophyllus ssp. leucophyllus var. leucophyllus Dougl. ex Lindl.
  velvet lupine
Lupinus littoralis Dougl.
  seashore lupine
Lupinus lyallii Gray
  dwarf mountain lupine
Lupinus minimus Dougl. ex Hook.
  Kettle Falls lupine
Lupinus mollis Heller
  soft lupine
Lupinus odoratus Heller
  Mojave royal lupine
Lupinus odoratus var. odoratus Heller
  Mojave royal lupine
Lupinus onustus S. Wats.
  Plumas lupine
Lupinus oreganus Heller
  Oregon lupine
Lupinus oreganus var. kincaidii C.P. Sm.
  Kincaid's lupine
Lupinus ornatus Dougl. ex Lindl.
  ornate lupine
Lupinus polycarpus Greene
  smallflower lupine
Lupinus polyphyllus Lindl.
  bigleaf lupine
Lupinus polyphyllus ssp. polyphyllus Lindl.
  bigleaf lupine
Lupinus polyphyllus ssp. polyphyllus var. pallidipes (Heller) C.P. Sm.
  bigleaf lupine
Lupinus polyphyllus ssp. polyphyllus var. polyphyllus Lindl.
  bigleaf lupine
Lupinus prunophilus M.E. Jones
  hairy bigleaf lupine
Lupinus pusillus Pursh
  rusty lupine
Lupinus pusillus ssp. intermontanus (Heller) D. Dunn
  Intermountain lupine
Lupinus rivularis Dougl. ex Lindl.
  riverbank lupine
Lupinus sabinianus Dougl. ex Lindl.
  Sabin's lupine
Lupinus saxosus T.J. Howell
  rock lupine
Lupinus saxosus var. saxosus T.J. Howell
  stonyground lupine
Lupinus saxosus var. subsericeus (B.L. Robins. ex Piper) C.P. Sm.
  stonyground lupine
Lupinus sellulus Kellogg
  Donner Lake lupine
Lupinus sellulus ssp. sellulus Kellogg
  Donner Lake lupine
Lupinus sellulus ssp. sellulus var. lobbii (Gray ex S. Wats.) Cox
  Lobb's lupine
Lupinus sellulus ssp. sellulus var. medius (Detling) Cox
  Donner Lake lupine
Lupinus sellulus ssp. sellulus var. sellulus Kellogg
  Donner Lake lupine
Lupinus sericeus Pursh
  silky lupine
Lupinus sericeus ssp. sericeus Pursh
  silky lupine
Lupinus sericeus ssp. sericeus var. egglestonianus C.P. Sm.
  Eggleston's silky lupine
Lupinus sericeus ssp. sericeus var. flexuosus (Lindl. ex J.G. Agardh) C.P. Sm.
  silky lupine
Lupinus sericeus ssp. sericeus var. maximus C.P. Sm. ex Fleak & D. Dunn
  silky lupine
Lupinus sericeus ssp. sericeus var. sericeus Pursh
  silky lupine
Lupinus subvexus C.P. Sm.
  valley lupine
Lupinus subvexus var. subvexus C.P. Sm.
  valley lupine
Lupinus subvexus var. transmontanus C.P. Sm.
  valley lupine
Lupinus suksdorfii B.L. Robins.
  Suksdorf's lupine
Lupinus sulphureus Dougl. ex Hook.
  sulphur lupine
Lupinus wyethii S. Wats.
  Wyeth's lupine
Lupinus wyethii ssp. tetonensis (E. Nels.) Cox & D. Dunn
  Teton lupine
Lupinus wyethii ssp. wyethii S. Wats.
  Wyeth's lupine
Medicago arabica (L.) Huds.
  spotted medick
Medicago lupulina L.
  black medick
Medicago minima (L.) L.
  burr medick
Medicago polymorpha L.
  burclover
Medicago sativa L.
  alfalfa
Medicago sativa ssp. sativa L.
  alfalfa
Melilotus albus Medik.
  = Melilotus officinalis
Melilotus indicus (L.) All.
  annual yellow sweetclover
Melilotus officinalis (L.) Lam.
  yellow sweetclover
Onobrychis viciifolia Scop.
  sainfoin
Ononis repens L.
  common restharrow
Oxytropis borealis DC.
Oxytropis borealis var. viscida (Nutt.) Welsh
Oxytropis campestris (L.) DC.
  cold mountain crazyweed
Oxytropis campestris var. columbiana (St. John) Barneby
  northern yellow locoweed
Oxytropis campestris var. cusickii (Greenm.) Barneby
  Cusick's crazyweed
Oxytropis deflexa (Pallas) DC.
  hangpod crazyweed
Oxytropis deflexa var. sericea Torr. & Gray
  longstem hangpod crazyweed
Oxytropis monticola Gray
  yellowflower locoweed
Pisum sativum L.
  garden pea
Psoralea 
  = Psoralidium 
Psoralidium lanceolatum (Pursh) Rydb.
  lemon scurfpea
Robinia pseudoacacia L.
  black locust
Rupertia physodes (Dougl. ex Hook.) J. Grimes
  California tea
Sarothamnus scoparius (L.) Wimmer ex Koch
  = Cytisus scoparius
Sphaerophysa salsula (Pallas) DC.
  alkali swainsonpea
Thermopsis gracilis T.J. Howell
Thermopsis gracilis var. gracilis T.J. Howell
Thermopsis gracilis var. ovata (B.L. Robins. ex Piper) M. Mendenhall
Thermopsis macrophylla Hook. & Arn.
  California goldenbanner
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 arvense L.
  rabbitfoot clover
Trifolium aureum Pollich
  golden clover
Trifolium bifidum Gray
  notchleaf clover
Trifolium campestre Schreb.
  field clover
Trifolium ciliolatum Benth.
  foothill clover
Trifolium cyathiferum Lindl.
  cup clover
Trifolium depauperatum Desv.
  cowbag clover
Trifolium dichotomum Hook. & Arn.
  branched Indian clover
Trifolium douglasii House
  Douglas' clover
Trifolium dubium Sibthorp
  suckling clover
Trifolium eriocephalum Nutt.
  woollyhead clover
Trifolium eriocephalum ssp. arcuatum (Piper) J. Gillett
  woollyhead clover
Trifolium eriocephalum ssp. eriocephalum Nutt.
  woollyhead clover
Trifolium fragiferum L.
  strawberry clover
Trifolium fucatum Lindl.
  bull clover
Trifolium gracilentum Torr. & Gray
  pinpoint clover
Trifolium hybridum L.
  alsike clover
Trifolium incarnatum L.
  crimson clover
Trifolium latifolium (Hook.) Greene
  twin clover
Trifolium longipes Nutt.
  longstalk clover
Trifolium longipes ssp. caurinum (Piper) J. Gillett
  longstalk clover
Trifolium longipes ssp. longipes Nutt.
  longstalk clover
Trifolium longipes ssp. multipedunculatum (Kennedy) J. Gillett
  longstalk clover
Trifolium longipes ssp. oreganum (T.J. Howell) J. Gillett
  Oregon clover
Trifolium longipes ssp. reflexum (A. Nels.) J. Gillett
  droopflower clover
Trifolium macraei Hook. & Arn.
  Chilean clover
Trifolium macrocephalum (Pursh) Poir.
  largehead clover
Trifolium microcephalum Pursh
  smallhead clover
Trifolium microdon Hook. & Arn.
  thimble clover
Trifolium oliganthum Steud.
  fewflower clover
Trifolium plumosum Dougl. ex Hook.
  plumed clover
Trifolium plumosum ssp. plumosum Dougl. ex Hook.
  plumed clover
Trifolium pratense L.
  red clover
Trifolium repens L.
  white clover
Trifolium resupinatum L.
  reversed clover
Trifolium subterraneum L.
  subterranean clover
Trifolium thompsonii Morton
  Thompson's clover
Trifolium variegatum Nutt.
  whitetip clover
Trifolium willdenowii Spreng.
  tomcat clover
Trifolium wormskioldii Lehm.
  cows clover
Ulex europaeus L.
  common gorse
Vicia americana Muhl. ex Willd.
  American vetch
Vicia americana ssp. americana Muhl. ex Willd.
  American vetch
Vicia americana ssp. minor (Hook.) C.R. Gunn
  mat vetch
Vicia cracca L.
  bird vetch
Vicia hirsuta (L.) S.F. Gray
  tiny vetch
Vicia nigricans Hook. & Arn.
  black vetch
Vicia nigricans ssp. gigantea (Hook.) Lassetter & Gunn.
  giant vetch
Vicia pannonica Crantz
  Hungarian vetch
Vicia sativa L.
  common vetch
Vicia sativa ssp. nigra (L.) Ehrh.
  common vetch
Vicia sativa ssp. sativa L.
  garden vetch
Vicia tetrasperma (L.) Schreb.
  lentil vetch
Vicia tetrasperma var. tetrasperma (L.) Moench
  lentil vetch
Vicia villosa Roth
  winter vetch

LEMNACEAE
Lemna minor L.
  common duckweed
Lemna trisulca L.
  star duckweed
Spirodela polyrrhiza (L.) Schleid.
  common duckweed
Wolffia borealis (Engelm. ex Hegelm.) Landolt ex Landolt & Wildi
  northern watermeal
Wolffia braziliensis Weddell
  Brazilian watermeal
Wolffiella gladiata (Hegelm.) Hegelm.
  Florida mudmidget

LENTIBULARIACEAE
Pinguicula macroceras Link
  California butterwort
Utricularia gibba L.
  humped bladderwort
Utricularia inflata Walt.
  swollen bladderwort
Utricularia intermedia Hayne
  flatleaf bladderwort
Utricularia minor L.
  lesser bladderwort
Utricularia ochroleuca R.W. Hartman
  yellowishwhite bladderwort

LILIACEAE
Allium acuminatum Hook.
  tapertip onion
Allium amplectens Torr.
  narrowleaf onion
Allium cernuum Roth
  nodding onion
Allium columbianum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg
  Columbian onion
Allium constrictum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg
  Grand Coulee onion
Allium crenulatum Wieg.
  Olympic onion
Allium dictuon St. John
  Blue Mountain onion
Allium douglasii Hook.
  Douglas' onion
Allium fibrillum M.E. Jones
  Blue Mountain onion
Allium geyeri S. Wats.
  Geyer's onion
Allium geyeri var. geyeri S. Wats.
  Geyer's onion
Allium geyeri var. tenerum M.E. Jones
  bulbil onion
Allium macrum S. Wats.
  rock onion
Allium nevii S. Wats.
  Nevius' garlic
Allium robinsonii Henderson
  Robinson's onion
Allium schoenoprasum L.
  wild chives
Allium schoenoprasum var. schoenoprasum L.
  wild chives
Allium scilloides Dougl. ex S. Wats.
  fragile onion
Allium textile A. Nels. & J.F. Macbr.
  textile onion
Allium tolmiei (Hook.) Baker ex S. Wats.
  Tolm's onion
Allium tolmiei var. tolmiei (Hook.) Baker ex S. Wats.
  Tolm's onion
Allium validum S. Wats.
  Pacific onion
Asparagus officinalis L.
  garden asparagus
Brodiaea coronaria (Salisb.) Engl.
  harvest clusterlily
Brodiaea coronaria ssp. coronaria (Salisb.) Engl.
  harvest clusterlily
Calochortus apiculatus Baker
  pointedtip Mariposa lily
Calochortus elegans Pursh
  northwestern Mariposa lily
Calochortus elegans var. elegans Pursh
  elegant Mariposa lily
Calochortus eurycarpus S. Wats.
  white Mariposa lily
Calochortus longebarbatus S. Wats.
  longbeard Mariposa lily
Calochortus longebarbatus var. longebarbatus S. Wats.
  longbeard Mariposa lily
Calochortus lyallii Baker
  Lyall's Mariposa lily
Calochortus macrocarpus Dougl.
  sagebrush Mariposa lily
Calochortus macrocarpus var. macrocarpus Dougl.
  sagebrush Mariposa lily
Calochortus macrocarpus var. maculosus (A. Nels. & J.F. Macbr.) A. Nels. & J.F. Macbr.
  Nez Perce Mariposa lily
Calochortus subalpinus Piper
  subalpine Mariposa lily
Calochortus tolmiei Hook. & Arn.
  Tolmie startulip
Camassia leichtlinii (Baker) S. Wats.
  large camas
Camassia leichtlinii ssp. suksdorfii (Greenm.) Gould
  Suksdorf's large camas
Camassia quamash (Pursh) Greene
  small camas
Camassia quamash ssp. azurea (Heller) Gould
  small camas
Camassia quamash ssp. breviflora Gould
  small camas
Camassia quamash ssp. maxima Gould
  small camas
Camassia quamash ssp. quamash (Pursh) Greene
  small camas
Clintonia uniflora (Menzies ex J.A. & J.H. Schultes) Kunth
  bride's bonnet
Dichelostemma capitatum (Benth.) Wood
  bluedicks
Disporum hookeri (Torr.) Nichols.
  drops of gold
Disporum hookeri var. oreganum (S. Wats.) Q. Jones
  Oregon drops of gold
Disporum smithii (Hook.) Piper
  largeflower fairybells
Disporum trachycarpum (S. Wats.) Benth. & Hook. f.
  roughfruit fairybells
Erythronium grandiflorum Pursh
  dogtooth lily
Erythronium grandiflorum ssp. candidum Piper
  yellow avalanchelily
Erythronium grandiflorum ssp. chrysandrum Applegate
  yellow avalanchelily
Erythronium grandiflorum ssp. grandiflorum Pursh
  yellow avalanchelily
Erythronium montanum S. Wats.
  white avalanchelily
Erythronium oregonum Applegate
  giant white fawnlily
Erythronium oregonum ssp. oregonum Applegate
  Oregon fawnlily
Erythronium revolutum Sm.
  mahogany fawnlily
Fritillaria affinis (Schultes) Sealy
Fritillaria affinis var. affinis (Schultes) Sealy
Fritillaria camschatcensis (L.) Ker-Gawl.
  Kamchatka missionbells
Fritillaria pudica (Pursh) Spreng.
  yellow missionbells
Lilium columbianum hort. ex Baker
  Columbian lily
Lloydia serotina (L.) Reichenb.
  common alplily
Maianthemum dilatatum (Wood) A. Nels. & J.F. Macbr.
  twoleaf false Solomon's seal
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
Smilacina amplexicaulis Nutt.
  = Maianthemum racemosum ssp. amplexicaule
Smilacina racemosa var. amplexicaulis (Nutt.) S. Wats.
  = Maianthemum racemosum ssp. amplexicaule
Smilacina stellata (L.) Desf.
  = Maianthemum stellatum
Stenanthium occidentale Gray
  western stenanthium
Streptopus amplexifolius (L.) DC.
  claspleaf twistedstalk
Streptopus amplexifolius var. amplexifolius (L.) DC.
  American twistedstalk
Streptopus amplexifolius var. chalazatus Fassett
  tubercle twistedstalk
Streptopus lanceolatus (Ait.) Reveal
Streptopus lanceolatus var. curvipes (Vail) Reveal
Streptopus lanceolatus var. roseus (Michx.) Reveal
Streptopus streptopoides (Ledeb.) Frye & Rigg
  northern twistedstalk
Streptopus streptopoides ssp. streptopoides (Ledeb.) Frye & Rigg
  small twistedstalk
Streptopus streptopoides ssp. streptopoides var. brevipes (Baker) Fassett
  small twistedstalk
Tofieldia glutinosa (Michx.) Pers.
  glutin tofieldia
Tofieldia glutinosa ssp. brevistyla C.L. Hitchc.
  sticky tofieldia
Tofieldia glutinosa ssp. occidentalis (S. Wats.) C.L. Hitchc.
  western tofieldia
Trillium albidum J.D. Freeman
  giant white wakerobin
Trillium chloropetalum (Torr.) T.J. Howell
  giant wakerobin
Trillium chloropetalum var. chloropetalum (Torr.) T.J. Howell
  giant wakerobin
Trillium ovatum Pursh
  Pacific trillium
Trillium ovatum ssp. ovatum Pursh
  Pacific trillium
Trillium parviflorum Soukup
  smallflower wakerobin
Trillium petiolatum Pursh
  Idaho trillium
Triteleia grandiflora Lindl.
  wild hyacinth
Triteleia grandiflora var. howellii (S. Wats.) Hoover
Triteleia hyacinthina (Lindl.) Greene
  hyacinth brodiaea
Triteleia hyacinthina var. hyacinthina (Lindl.) Greene
  fool's onion
Uvularia  L.
  = Streptopus 
Veratrum californicum Dur.
  California false hellebore
Veratrum californicum var. californicum Dur.
  California false hellebore
Veratrum californicum var. caudatum (Heller) C.L. Hitchc.
  cascade false hellebore
Veratrum insolitum Jepson
  Siskiyou false hellebore
Veratrum viride Ait.
  American false hellebore
Xerophyllum tenax (Pursh) Nutt.
  common beargrass
Zigadenus elegans Pursh
  mountain deathcamas
Zigadenus paniculatus (Nutt.) S. Wats.
  foothill deathcamas
Zigadenus venenosus S. Wats.
  meadow deathcamas
Zigadenus venenosus var. gramineus (Rydb.) Walsh ex M.E. Peck
  grassy deathcamas
Zigadenus venenosus var. venenosus S. Wats.
  meadow deathcamas

LIMNANTHACEAE
Floerkea proserpinacoides Willd.
  false mermaidweed

LINACEAE
Linum lewisii Pursh
  prairie flax
Linum lewisii var. lewisii Pursh
  Lewis' flax
Linum usitatissimum L.
  common flax
Sclerolinon digynum (Gray) Rogers
  digynum flax

LOASACEAE
Mentzelia albicaulis (Dougl. ex Hook.) Dougl. ex Torr. & Gray
  whitestem blazingstar
Mentzelia albicaulis var. albicaulis (Dougl. ex Hook.) Dougl. ex Torr. & Gray
  whitestem blazingstar
Mentzelia dispersa S. Wats.
  bushy blazingstar
Mentzelia dispersa var. compacta (A. Nels.) J.F. Macbr.
  Nevada blazingstar
Mentzelia dispersa var. dispersa S. Wats.
  bushy blazingstar
Mentzelia dispersa var. latifolia (Rydb.) J.F. Macbr.
  bushy blazingstar
Mentzelia laevicaulis (Dougl. ex Hook.) Torr. & Gray
  smoothstem blazingstar
Mentzelia laevicaulis var. laevicaulis (Dougl. ex Hook.) Torr. & Gray
  smoothstem blazingstar
Mentzelia laevicaulis var. parviflora (Dougl. ex Hook.) C.L. Hitchc.
  smoothstem blazingstar

LYCOPODIACEAE
Huperzia chinensis (Christ) Czern.
  Chinese clubmoss
Huperzia selago (L.) Bernh. ex Mart. & Schrank
  fir clubmoss
Huperzia selago var. selago (L.) Bernh. ex Mart. & Schrank
  fir clubmoss
Lycopodiella inundata (L.) Holub
  inundated clubmoss
Lycopodium alpinum L.
  alpine clubmoss
Lycopodium annotinum L.
  stiff clubmoss
Lycopodium annotinum var. annotinum L.
  stiff clubmoss
Lycopodium clavatum L.
  running clubmoss
Lycopodium complanatum L.
  groundcedar
Lycopodium dendroideum Michx.
  tree groundpine
Lycopodium lagopus (Laestad. ex Hartm.) Zinserl. ex Kuzen
Lycopodium obscurum L.
  rare clubmoss
Lycopodium sitchense Rupr.
  Sitka clubmoss

LYTHRACEAE
Ammannia coccinea Rottb.
  valley redstem
Ammannia robusta Heer & Regel
  grand redstem
Lythrum hyssopifolia L.
  hyssop loosestrife
Lythrum portula (L.) D.A. Webber
  spatulaleaf loosestrife
Lythrum salicaria L.
  purple loosestrife
Rotala ramosior (L.) Koehne
  lowland rotala

MALVACEAE
Abutilon theophrasti Medik.
  velvetleaf
Iliamna longisepala (Torr.) Wiggins
  longsepal iliamna
Iliamna rivularis (Dougl. ex Hook.) Greene
  streambank globemallow
Iliamna rivularis var. rivularis (Dougl. ex Hook.) Greene
  streambank wildhollyhock
Malva moschata L.
  musk mallow
Malva neglecta Wallr.
  common mallow
Malva parviflora L.
  cheeseweed mallow
Malva rotundifolia auct. non L.
  = Malva neglecta
Malva sylvestris L.
  high mallow
Malvella Jaubert & Spach
  malvella
Malvella leprosa (Ortega) Krapov.
  alkali mallow
Sida hederacea (Dougl. ex Hook.) Torr. ex Gray
  = Malvella leprosa
Sida leprosa (Ortega) K. Schum.
  = Malvella leprosa
Sidalcea campestris Greene
  meadow checkermallow
Sidalcea hendersonii S. Wats.
  Henderson's checkermallow
Sidalcea hirtipes C.L. Hitchc.
  bristlystem checkermallow
Sidalcea oregana (Nutt. ex Torr. & Gray) Gray
  Oregon checkermallow
Sidalcea oregana ssp. oregana (Nutt. ex Torr. & Gray) Gray
  Oregon checkermallow
Sidalcea oregana ssp. oregana var. calva C.L. Hitchc.
  Oregon checkermallow
Sidalcea oregana ssp. oregana var. procera C.L. Hitchc.
  Oregon checkermallow
Sphaeralcea coccinea (Nutt.) Rydb.
  scarlet globemallow
Sphaeralcea coccinea ssp. coccinea (Nutt.) Rydb.
  scarlet globemallow
Sphaeralcea grossulariifolia (Hook. & Arn.) Rydb.
  gooseberryleaf globemallow
Sphaeralcea grossulariifolia ssp. grossulariifolia (Hook. & Arn.) Rydb.
  gooseberryleaf globemallow
Sphaeralcea munroana (Dougl. ex Lindl.) Spach ex Gray
  Munro's globemallow
Sphaeralcea munroana ssp. munroana (Dougl. ex Lindl.) Spach ex Gray
  Munro's globemallow

MARSILEACEAE
Marsilea oligospora Goodding
  Pacific waterclover
Marsilea vestita Hook. & Grev.
  hairy pepperwort
Marsilea vestita ssp. vestita Hook. & Grev.
  hairy pepperwort

MENYANTHACEAE
Fauria crista-galli (Menzies ex Hook.) Makino
  deercabbage
Menyanthes trifoliata L.
  common buckbean
Nymphoides peltata (Gmel.) Kuntze
  yellow floatingheart

MOLLUGINACEAE
Mollugo verticillata L.
  green carpetweed

MONOTROPACEAE
Allotropa virgata Torr. & Gray ex Gray
  sugarstick
Hemitomes congestum Gray
  coneplant
Hypopitys 
  = Monotropa 
Monotropa hypopithys L.
  pinesap
Monotropa uniflora L.
  Indianpipe
Pleuricospora fimbriolata Gray
  fringed pinesap
Pterospora andromedea Nutt.
  woodland pinedrops

MORACEAE
Maclura pomifera (Raf.) Schneid.
  osageorange
Morus alba L.
  white mulberry

MYRICACEAE
Myrica californica Cham.
  Pacific bayberry
Myrica gale L.
  sweetgale

NAJADACEAE
Najas flexilis (Willd.) Rostk. & Schmidt
  nodding waternymph
Najas guadalupensis (Spreng.) Magnus
  southern waternymph
Najas guadalupensis var. guadalupensis (Spreng.) Magnus
  Guadalupe waternymph

NYCTAGINACEAE
Abronia latifolia Eschsch.
  coastal sand verbena
Abronia mellifera Dougl. ex Hook.
  white sand verbena
Abronia umbellata Lam.
  pink sand verbena

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 odorata Ait.
  American white waterlily

OLEACEAE
Fraxinus latifolia Benth.
  Oregon ash

ONAGRACEAE
Boisduvalia 
  = Epilobium 
Camissonia andina (Nutt.) Raven
  sundrops eveningprimrose
Camissonia boothii (Dougl. ex Lehm.) Raven
  Booth's eveningprimrose
Camissonia boothii ssp. boothii (Dougl. ex Lehm.) Raven
  Booth's suncup
Camissonia contorta (Dougl. ex Lehm.) Kearney
  plains eveningprimrose
Camissonia hilgardii (Greene) Raven
  Hilgard's suncup
Camissonia minor (A. Nels.) Raven
  small eveningprimrose
Camissonia parvula (Nutt. ex Torr. & Gray) Raven
  Lewis River suncup
Camissonia pygmaea (Dougl. ex Lehm.) Raven
  dwarf suncup
Camissonia subacaulis (Pursh) Raven
  diffuseflower eveningprimrose
Camissonia tanacetifolia (Torr. & Gray) Raven
  tansyleaf eveningprimrose
Camissonia tanacetifolia ssp. tanacetifolia (Torr. & Gray) Raven
  tansyleaf eveningprimrose
Circaea alpina L.
  small enchanter's nightshade
Circaea alpina ssp. alpina L.
  small enchanter's nightshade
Circaea alpina ssp. pacifica (Aschers. & Magnus) Raven
  small enchanter's nightshade
Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr.
  farewell to spring
Clarkia amoena ssp. caurina (Abrams ex Piper) H.F. & M.E. Lewis
  farewell to spring
Clarkia amoena ssp. lindleyi (Dougl.) H.F. & M.E. Lewis
  Lindley's clarkia
Clarkia gracilis (Piper) A. Nels. & J.F. Macbr.
  slender fairyfan
Clarkia pulchella Pursh
  pinkfairies
Clarkia purpurea (W. Curtis) A. Nels. & J.F. Macbr.
  winecup fairyfan
Clarkia purpurea ssp. quadrivulnera (Dougl. ex Lindl.) H.F. & M.E. Lewis
  winecup fairyfan
Clarkia rhomboidea Dougl. ex Hook.
  diamond fairyfan
Epilobium anagallidifolium Lam.
  alpine willowherb
Epilobium angustifolium L.
  fireweed
Epilobium brachycarpum K. Presl
  autumn willowweed
Epilobium ciliatum Raf.
  hairy willowherb
Epilobium ciliatum ssp. ciliatum Raf.
  coast willowweed
Epilobium ciliatum ssp. glandulosum (Lehm.) Hoch & Raven
  glandular willowweed
Epilobium ciliatum ssp. watsonii (Barbey) Hoch & Raven
  northern willowherb
Epilobium clavatum Trel.
  clubfruit willowherb
Epilobium densiflorum (Lindl.) Hoch & Raven
Epilobium foliosum (Torr. & Gray) Suksdorf
  California willowherb
Epilobium glaberrimum Barbey
  smooth willowweed
Epilobium glaberrimum ssp. fastigiatum (Nutt.) Hoch & Raven
  smooth willowweed
Epilobium glaberrimum ssp. glaberrimum Barbey
  smooth willowweed
Epilobium halleanum Hausskn.
  glandular willowherb
Epilobium hirsutum L.
  codlins and cream (??)
Epilobium hornemannii Reichenb.
  Hornemann's willowherb
Epilobium hornemannii ssp. hornemannii Reichenb.
  Hornemann's willowherb
Epilobium lactiflorum Hausskn.
  milkflower willowweed
Epilobium latifolium L.
  dwarf fireweed
Epilobium leptocarpum Hausskn.
  slenderfruit willowherb
Epilobium leptophyllum Raf.
  bog willowherb
Epilobium luteum Pursh
  yellow willowherb
Epilobium minutum Lindl. ex Lehm.
  small willowweed
Epilobium mirabile Trel. ex Piper
  Olympic Mountain willowherb
Epilobium oregonense Hausskn.
  slimstem willowweed
Epilobium palustre L.
  marsh willowherb
Epilobium pygmaeum (Speg.) Hoch & Raven
Epilobium saximontanum Hausskn.
  Rocky Mountain willowherb
Epilobium suffruticosum Nutt.
  shrub willowherb
Epilobium torreyi (S. Wats.) Hoch & Raven
Gaura coccinea Nutt. ex Pursh
  scarlet beeblossom
Gaura parviflora Dougl. ex Lehm.
  velvetweed
Gayophytum decipiens Lewis & Szweykowski
  deceptive groundsmoke
Gayophytum diffusum Torr. & Gray
  spreading groundsmoke
Gayophytum diffusum ssp. diffusum Torr. & Gray
  spreading groundsmoke
Gayophytum diffusum ssp. parviflorum Lewis & Szweykowski
  spreading groundsmoke
Gayophytum heterozygum Lewis & Szweykowski
  zigzag groundsmoke
Gayophytum humile Juss.
  dwarf groundsmoke
Gayophytum racemosum Torr. & Gray
  blackfoot groundsmoke
Gayophytum ramosissimum Torr. & Gray
  pinyon groundsmoke
Ludwigia palustris (L.) Ell.
  marsh seedbox
Oenothera cespitosa Nutt.
  tufted eveningprimrose
Oenothera cespitosa ssp. cespitosa Nutt.
  tufted eveningprimrose
Oenothera cespitosa ssp. marginata (Nutt. ex Hook. & Arn.) Munz
  tufted eveningprimrose
Oenothera elata Kunth
  Hooker's eveningprimrose
Oenothera elata ssp. hirsutissima (Gray ex S. Wats.) W. Dietr.
  Hooker's eveningprimrose
Oenothera glazioviana Micheli
  redsepal eveningprimrose
Oenothera hookeri
  = Oenothera elata ssp. hirsutissima
Oenothera pallida Lindl.
  pale eveningprimrose
Oenothera pallida ssp. pallida Lindl.
  pale eveningprimrose
Oenothera villosa Thunb.
  hairy eveningprimrose
Oenothera villosa ssp. strigosa (Rydb.) W. Dietr. & Raven
  hairy eveningprimrose

OPHIOGLOSSACEAE
Botrychium lanceolatum (Gmel.) Angstr.
  lanceleaf grapefern
Botrychium lanceolatum var. lanceolatum (Gmel.) Angstr.
  lanceleaf grapefern
Botrychium lunaria (L.) Sw.
  common moonwort
Botrychium minganense Victorin
  Mingan moonwort
Botrychium montanum W.H. Wagner
  mountain moonwort
Botrychium multifidum (Gmel.) Trev.
  leathery grapefern
Botrychium pinnatum St. John
  northern moonwort
Botrychium simplex E. Hitchc.
  little grapefern
Botrychium virginianum (L.) Sw.
  rattlesnake fern
Ophioglossum pusillum Raf.
  northern adderstongue
Ophioglossum vulgatum auct. non L.
  = Ophioglossum pusillum
Ophioglossum vulgatum var. alaskanum (E.G. Britt.) C. Christens.
  = Ophioglossum pusillum
Ophioglossum vulgatum var. pseudopodum (Blake) Farw.
  = Ophioglossum pusillum

ORCHIDACEAE
Calypso Salisb.
  calypso orchid
Calypso bulbosa (L.) Oakes
  fairyslipper orchid
Calypso bulbosa var. occidentalis (Holz.) Boivin
  fairyslipper orchid
Cephalanthera austiniae (Gray) Heller
  phantom orchid
Coeloglossum viride (L.) Hartman
  longbract frog orchid
Coeloglossum viride var. virescens (Muhl. ex Willd.) Luer
  longbract frog orchid
Corallorrhiza maculata (Raf.) Raf.
  summer coralroot
Corallorrhiza mertensiana Bong.
  Pacific coralroot
Corallorrhiza striata Lindl.
  hooded coralroot
Corallorrhiza striata var. striata Lindl.
  hooded coralroot
Corallorrhiza trifida Chatelain
  yellow coralroot
Cypripedium calceolus ssp. parviflorum (Salisb.) Hulten
  = Cypripedium parviflorum
Cypripedium fasciculatum Kellogg ex S. Wats.
  clustered lady's slipper
Cypripedium montanum Dougl. ex Lindl.
  mountain lady's slipper
Cypripedium parviflorum Salisb.
  lesser yellow lady's slipper
Epipactis gigantea Dougl. ex Hook.
  giant helleborine
Goodyera oblongifolia Raf.
  western rattlesnake plantain
Habenaria 
  = Platanthera 
Habenaria unalascensis (Spreng.) S. Wats.
  = Piperia unalascensis
Limnorchis 
  = Platanthera 
Liparis loeselii (L.) L.C. Rich.
  yellow widelip orchid
Listera borealis Morong
  northern twayblade
Listera caurina Piper
  northwestern twayblade
Listera convallarioides (Sw.) Nutt. ex Ell.
  broadlipped twayblade
Listera cordata (L.) R. Br. ex Ait. f.
  heartleaf twayblade
Piperia elegans (Lindl.) Rydb.
  hillside bogorchid
Piperia elongata Rydb.
  denseflower rein orchid
Piperia elongata ssp. elongata Rydb.
  denseflower rein orchid
Piperia unalascensis (Spreng.) Rydb.
  Alaska rein orchid
Platanthera chorisiana (Cham.) Reichenb.
  Choriso bog orchid
Platanthera cooperi (S. Wats.) Rydb.
  = Piperia unalascensis
Platanthera dilatata (Pursh) Lindl. ex Beck
  boreal bog orchid
Platanthera dilatata var. albiflora (Cham.) Ledeb.
  scentbottle
Platanthera dilatata var. dilatata (Pursh) Lindl. ex Beck
  scentbottle
Platanthera hyperborea (L.) Lindl.
  northern green orchid
Platanthera hyperborea var. gracilis (Lindl.) Luer
  northern green orchid
Platanthera hyperborea var. hyperborea (L.) Lindl.
  northern green orchid
Platanthera hyperborea var. viridiflora (Cham.) Luer
  northern green orchid
Platanthera leucostachys Lindl.
  bog orchid
Platanthera obtusata (Banks ex Pursh) Lindl.
  blunt bog orchid
Platanthera orbiculata (Pursh) Lindl.
  large roundleaved orchid
Platanthera orbiculata var. orbiculata (Pursh) Lindl.
  large roundleaved orchid
Platanthera sparsiflora (S. Wats.) Schlechter
  canyon bog orchid
Platanthera sparsiflora var. sparsiflora (S. Wats.) Schlechter
  canyon bog orchid
Platanthera stricta Lindl.
  Modoc bog orchid
Spiranthes porrifolia Lindl.
  creamy ladiestresses
Spiranthes romanzoffiana Cham.
  hooded ladiestresses

OROBANCHACEAE
Boschniakia hookeri Walp.
  Vancouver groundcone
Orobanche californica Cham. & Schlecht.
  California broomrape
Orobanche californica ssp. californica Cham. & Schlecht.
  California broomrape
Orobanche californica ssp. grayana (G. Beck) Heckard
  Gray's broomrape
Orobanche corymbosa (Rydb.) Ferris
  flattop broomrape
Orobanche fasciculata Nutt.
  clustered broomrape
Orobanche ludoviciana Nutt.
  Louisiana broomrape
Orobanche ludoviciana ssp. ludoviciana Nutt.
  sand broomrape
Orobanche minor Sm.
  hellroot
Orobanche pinorum Geyer ex Hook.
  conifer broomrape
Orobanche uniflora L.
  oneflowered broomrape

OXALIDACEAE
Oxalis corniculata L.
  creeping woodsorrel
Oxalis dillenii Jacq.
  Dillen's oxalis
Oxalis oregana Nutt.
  Oregon oxalis
Oxalis stricta L.
  common yellow oxalis
Oxalis suksdorfii Trel.
  Suksdorf woodsorrel
Oxalis trilliifolia Hook.
  threeleaf woodsorrel

PAEONIACEAE
Paeonia brownii Dougl. ex Hook.
  Brown's peony

PAPAVERACEAE
Eschscholzia californica Cham.
  California poppy
Eschscholzia californica ssp. californica Cham.
  California poppy
Meconella oregana Nutt.
  white fairypoppy
Papaver argemone L.
  long pricklyhead poppy
Papaver somniferum L.
  opium poppy

PINACEAE
Abies amabilis (Dougl. ex Loud.) Dougl. ex Forbes
  Pacific silver fir
Abies grandis (Dougl. ex D. Don) Lindl.
  grand fir
Abies lasiocarpa (Hook.) Nutt.
  subalpine fir
Abies lasiocarpa var. lasiocarpa (Hook.) Nutt.
  subalpine fir
Abies procera Rehd.
  noble fir
Larix lyallii Parl.
  subalpine larch
Larix occidentalis Nutt.
  western larch
Picea engelmannii Parry ex Engelm.
  Engelmann's spruce
Picea sitchensis (Bong.) Carr.
  Sitka spruce
Pinus albicaulis Engelm.
  whitebark pine
Pinus contorta Dougl. ex Loud.
  lodgepole pine
Pinus contorta var. contorta Dougl. ex Loud.
  lodgepole pine
Pinus contorta var. latifolia Engelm. ex S. Wats.
  tall lodgepole pine
Pinus contorta var. murrayana (Grev. & Balf.) Engelm.
  Murray lodgepole pine
Pinus monticola Dougl. ex D. Don
  western white pine
Pinus ponderosa P.& C. Lawson
  ponderosa pine
Pinus ponderosa var. ponderosa P.& C. Lawson
  ponderosa pine
Pseudotsuga menziesii (Mirbel) Franco
  Douglas fir
Pseudotsuga menziesii var. glauca (Beissn.) Franco
  Rocky Mountain Douglas fir
Pseudotsuga menziesii var. menziesii (Mirbel) Franco
  Douglas fir
Tsuga heterophylla (Raf.) Sarg.
  western hemlock
Tsuga mertensiana (Bong.) Carr.
  mountain hemlock

PLANTAGINACEAE
Plantago aristata Michx.
  largebracted plantain
Plantago australis Lam.
  Mexican plantain
Plantago australis ssp. hirtella (Kunth) Rahn
  Mexican plantain
Plantago bigelovii Gray
  annual coastal plantain
Plantago coronopus L.
  buckhorn plantain
Plantago elongata Pursh
  longleaf plantain
Plantago elongata ssp. elongata Pursh
  prairie plantain
Plantago elongata ssp. pentasperma Bassett
  prairie plantain
Plantago lanceolata L.
  narrowleaf plantain
Plantago macrocarpa Cham. & Schlecht.
  seashore plantain
Plantago major L.
  common plantain
Plantago major var. pachyphylla Pilger
  thickleaf plantain
Plantago maritima L.
  goose tongue
Plantago maritima var. californica (Fern.) Pilger
  California goose tongue
Plantago maritima var. juncoides (Lam.) Gray
  goose tongue
Plantago patagonica Jacq.
  woolly plantain
Plantago psyllium L.
  whorled plantain
Plantago pusilla Nutt.
  dwarf plantain

PLUMBAGINACEAE
Armeria maritima (P. Mill.) Willd.
  thrift seapink
Armeria maritima ssp. californica (Boiss.) Porsild
  California seapink
Armeria maritima ssp. purpurea (W.D.J. Koch) A.& D. Love
  sea thrift

POLEMONIACEAE
Collomia debilis (S. Wats.) Greene
  alpine mountaintrumpet
Collomia debilis var. debilis (S. Wats.) Greene
  alpine mountaintrumpet
Collomia debilis var. trifida Payson
  alpine mountaintrumpet
Collomia grandiflora Dougl. ex Lindl.
  largeflower mountaintrumpet
Collomia heterophylla Dougl. ex Hook.
  variableleaf mountaintrumpet
Collomia larsenii Gray
Collomia linearis Nutt.
  narrowleaf mountaintrumpet
Collomia tenella Gray
  diffuse mountaintrumpet
Collomia tinctoria Kellogg
  yellowstaining mountaintrumpet
Eriastrum wilcoxii (A. Nels.) Mason
  Wilcox's woolstar
Gilia capillaris Kellogg
  miniature gilia
Gilia capitata Sims
  bluehead gilia
Gilia capitata ssp. capitata Sims
  bluehead gilia
Gilia capitata ssp. chamissonis (Greene) V. Grant
  bluehead gilia
  = Phlox gracilis ssp. gracilis
Gilia leptomeria Gray
  sand gilia
Gilia ochroleuca M.E. Jones
  volcanic gilia
Gilia sinuata Dougl. ex Benth.
  rosy gilia
Gilia transmontana (Mason & A. Grant) A.& V. Grant
  transmontane gilia
Ipomopsis aggregata (Pursh) V. Grant
  skyrocket gilia
Ipomopsis aggregata ssp. aggregata (Pursh) V. Grant
  skyrocket gilia
Ipomopsis congesta (Hook.) V. Grant
  ballhead gilia
Ipomopsis congesta ssp. congesta (Hook.) V. Grant
  ballhead gilia
Ipomopsis minutiflora (Benth.) V. Grant
  littleflower gilia
Leptodactylon pungens (Torr.) Torr. ex Nutt.
  granite pricklygilia
Linanthus bicolor (Nutt.) Greene
  true babystars
Linanthus bicolor ssp. bicolor (Nutt.) Greene
  true babystars
Linanthus bicolor ssp. minimus Mason
  true babystars
Linanthus bolanderi (Gray) Greene
  Bolander's deserttrumpets
Linanthus harknessii (Curran) Greene
  Harkness' flaxflower
Linanthus harknessii ssp. harknessii (Curran) Greene
  Harkness' flaxflower
Linanthus liniflorus (Benth.) Greene
  narrowflower flaxflower
Linanthus liniflorus ssp. pharnaceoides (Benth.) Mason
  lighthouse flaxflower
Linanthus nuttallii (Gray) Greene ex Milliken
  Nuttall's deserttrumpets
Linanthus nuttallii ssp. nuttallii (Gray) Greene ex Milliken
  Nuttall's deserttrumpets
Linanthus nuttallii ssp. pubescens Patterson
  Nuttall's deserttrumpets
Linanthus septentrionalis Mason
  northern linanthus
Navarretia breweri (Gray) Greene
  Brewer's navarretia
Navarretia divaricata (Torr. ex Gray) Greene
  divaricate navarretia
Navarretia divaricata ssp. divaricata (Torr. ex Gray) Greene
  divaricate navarretia
Navarretia intertexta (Benth.) Hook.
  needleleaf navarretia
Navarretia intertexta ssp. intertexta (Benth.) Hook.
  needleleaf navarretia
Navarretia intertexta ssp. propinqua (Suksdorf) Day
  near navarretia
Navarretia leucocephala Benth.
  whitehead navarretia
Navarretia leucocephala ssp. minima (Nutt.) Day
  least navarretia
Navarretia squarrosa (Eschsch.) Hook. & Arn.
  skunkbush
Navarretia tagetina Greene
  marigold pincushionplant
Phlox colubrina Wherry & Constance
  Snake River phlox
Phlox diffusa Benth.
  spreading phlox
Phlox diffusa ssp. diffusa Benth.
  spreading phlox
Phlox diffusa ssp. longistylis Wherry
  spreading phlox
Phlox diffusa ssp. subcarinata Wherry
  spreading phlox
Phlox gracilis (Hook.) Greene
  slender phlox
Phlox gracilis ssp. gracilis (Hook.) Greene
  slender phlox
Phlox gracilis ssp. humilis (Greene) Mason
  dwarf phlox
Phlox hendersonii (E. Nels.) Cronq.
  Henderson's phlox
Phlox hoodii Richards.
  spiny phlox
Phlox hoodii ssp. canescens (Torr. & Gray) Wherry
  carpet phlox
Phlox longifolia Nutt.
  longleaf phlox
Phlox longifolia ssp. longifolia Nutt.
  longleaf phlox
Phlox mollis Wherry
  soft phlox
Phlox rigida Benth.
  stiff phlox
Phlox speciosa Pursh
  showy phlox
Phlox speciosa ssp. lanceolata (E. Nels.) Wherry
  showy phlox
Phlox speciosa ssp. lignosa Brand
  showy phlox
Phlox speciosa ssp. nitida (Suksdorf) Wherry
  showy phlox
Phlox speciosa ssp. occidentalis (Dur. ex Torr.) Wherry
  showy phlox
Phlox speciosa ssp. speciosa Pursh
  showy phlox
Phlox viridis E. Nels.
  green phlox
Phlox viridis ssp. compacta (Brand) Wherry
  green phlox
Phlox viridis ssp. longipes (M.E. Jones) Wherry
  green phlox
Phlox viscida E. Nels.
  sticky phlox
Polemonium californicum Eastw.
  moving polemonium
Polemonium carneum Gray
  royal Jacobsladder
Polemonium elegans Greene
  elegant Jacobsladder
Polemonium micranthum Benth.
  annual polemonium
Polemonium occidentale Greene
  western polemonium
Polemonium occidentale ssp. occidentale Greene
  western polemonium
Polemonium pectinatum Greene
  Washington Jacobsladder
Polemonium pulcherrimum Hook.
  skunkleaf polemonium
Polemonium pulcherrimum ssp. lindleyi (Wherry) V. Grant
  Lindley's polemonium
Polemonium pulcherrimum ssp. pulcherrimum Hook.
  pretty Jacobsladder
Polemonium viscosum Nutt.
  sticky polemonium

POLYGONACEAE
Chorizanthe watsonii Torr. & Gray
  fivetooth spineflower
Eriogonum baileyi S. Wats.
  Bailey's buckwheat
Eriogonum baileyi var. praebens (Gandog.) Reveal
  Bailey's buckwheat
Eriogonum compositum Dougl. ex Benth.
  arrowleaf buckwheat
Eriogonum compositum var. compositum Dougl. ex Benth.
  arrowleaf buckwheat
Eriogonum compositum var. lancifolium St. John & Warren
  arrowleaf buckwheat
Eriogonum compositum var. leianthum Hook.
  arrowleaf buckwheat
Eriogonum douglasii Benth.
  Douglas' buckwheat
Eriogonum douglasii var. douglasii Benth.
  Douglas' buckwheat
Eriogonum douglasii var. sublineare (S. Stokes) Reveal
  Douglas' buckwheat
Eriogonum elatum Dougl. ex Benth.
  tall woolly buckwheat
Eriogonum flavum Nutt.
  yellow eriogonum
Eriogonum flavum var. piperi (Greene) M.E. Jones
  Piper's golden buckwheat
Eriogonum heracleoides Nutt.
  parsnipflower buckwheat
Eriogonum heracleoides var. angustifolium (Nutt.) Torr. & Gray
  parsnipflower buckwheat
Eriogonum heracleoides var. heracleoides Nutt.
  parsnipflower buckwheat
Eriogonum heracleoides var. leucophaeum Reveal
  parsnipflower buckwheat
Eriogonum microthecum Nutt.
  slender buckwheat
Eriogonum microthecum var. laxiflorum Hook.
  slender buckwheat
Eriogonum niveum Dougl. ex Benth.
  snow buckwheat
Eriogonum nudum Dougl. ex Benth.
  naked buckwheat
Eriogonum ovalifolium Nutt.
  cushion buckwheat
Eriogonum ovalifolium var. nivale (Canby) M.E. Jones
  cushion buckwheat
Eriogonum ovalifolium var. purpureum (Nutt.) Dur.
  cushion buckwheat
Eriogonum pyrolifolium Hook.
  Shasta buckwheat
Eriogonum pyrolifolium var. coryphaeum Torr. & Gray
  Shasta buckwheat
Eriogonum pyrolifolium var. pyrolifolium Hook.
  Shasta buckwheat
Eriogonum spergulinum Gray
  spurry buckwheat
Eriogonum spergulinum var. reddingianum (M.E. Jones) J.T. Howell
  Redding buckwheat
Eriogonum sphaerocephalum Dougl. ex Benth.
  rock buckwheat
Eriogonum sphaerocephalum var. halimioides S. Stokes
  rock buckwheat
Eriogonum sphaerocephalum var. sphaerocephalum Dougl. ex Benth.
  rock buckwheat
Eriogonum strictum Benth.
  Blue Mountain buckwheat
Eriogonum strictum ssp. proliferum (Torr. & Gray) S. Stokes
  Blue Mountain buckwheat
Eriogonum strictum ssp. proliferum var. anserinum (Greene) R.J. Davis
  Blue Mountain buckwheat
Eriogonum strictum ssp. proliferum var. glabrum C.L. Hitchc.
  Blue Mountain buckwheat
Eriogonum strictum ssp. proliferum var. proliferum (Torr. & Gray) C.L. Hitchc.
  Blue Mountain buckwheat
Eriogonum strictum ssp. strictum Benth.
  Blue Mountain buckwheat
Eriogonum thymoides Benth.
  thymeleaf buckwheat
Eriogonum umbellatum Torr.
  sulphur wildbuckwheat
Eriogonum umbellatum var. hausknechtii (Dammer) M.E. Jones
  Hausknecht's buckwheat
Eriogonum umbellatum var. hypoleium (Piper) C.L. Hitchc.
  sulphurflower buckwheat
Eriogonum umbellatum var. majus Hook.
  sulphurflower buckwheat
Eriogonum umbellatum var. polyanthum (Benth.) M.E. Jones
  sulphurflower buckwheat
Eriogonum umbellatum var. stellatum (Benth.) M.E. Jones
  sulphurflower buckwheat
Eriogonum umbellatum var. umbellatum Torr.
  sulphurflower buckwheat
Eriogonum vimineum Dougl. ex Benth.
  wickerstem buckwheat
Oxyria digyna (L.) Hill
  alpine mountainsorrel
Oxytheca dendroidea Nutt.
  narrowleaf oxytheca
Polygonum amphibium L.
  water knotweed
Polygonum amphibium var. emersum Michx.
  longroot smartweed
Polygonum amphibium var. stipulaceum Coleman
  water smartweed
Polygonum aviculare L.
  prostrate knotweed
Polygonum bistortoides Pursh
  American bistort
Polygonum buxiforme Small
  box knotweed
Polygonum californicum Meisn.
  California knotweed
Polygonum campanulatum Hook. f.
  bellflower smartweed
Polygonum convolvulus L.
  black bindweed
Polygonum cuspidatum Sieb. & Zucc.
  Japanese knotweed
Polygonum douglasii Greene
  Douglas' knotweed
Polygonum douglasii ssp. austiniae (Greene) E. Murr.
  Austin knotweed
Polygonum douglasii ssp. douglasii Greene
  Douglas' knotweed
Polygonum douglasii ssp. johnstonii (Munz) Hickman
  Johnston's knotweed
Polygonum douglasii ssp. majus (Meisn.) Hickman
  large knotweed
Polygonum douglasii ssp. nuttallii (Small) Hickman
  Nuttall's knotweed
Polygonum douglasii ssp. spergulariiforme (Meisn. ex Small) Hickman
  scatter knotweed
Polygonum erectum L.
  erect knotweed
Polygonum fowleri B.L. Robins.
  Fowler's knotweed
Polygonum hydropiper L.
  marshpepper knotweed
Polygonum hydropiperoides Michx.
  swamp smartweed
Polygonum lapathifolium L.
  curlytop knotweed
Polygonum lapathifolium var. lapathifolium L.
  curlytop knotweed
Polygonum minimum S. Wats.
  broadleaf knotweed
Polygonum newberryi Small
  Newberry's knotweed
Polygonum paronychia Cham. & Schlecht.
  beach knotweed
Polygonum parryi Greene
  Parry's knotweed
Polygonum persicaria L.
  spotted ladysthumb
Polygonum phytolaccifolium Meisn. ex Small
  poke knotweed
Polygonum polygaloides Wallich ex Meisn.
  polygala knotweed
Polygonum polygaloides ssp. confertiflorum (Nutt. ex Piper) Hickman
  fruitleaf knotweed
Polygonum polygaloides ssp. kelloggii (Greene) Hickman
  Kellogg's knotweed
Polygonum polygaloides ssp. polygaloides Wallich ex Meisn.
  fruitleaf knotweed
Polygonum punctatum Ell.
  dotted smartweed
Polygonum punctatum var. confertiflorum (Meisn.) Fassett
  dotted smartweed
Polygonum punctatum var. punctatum Ell.
  dotted smartweed
Polygonum ramosissimum Michx.
  bushy knotweed
Polygonum ramosissimum var. ramosissimum Michx.
  bushy knotweed
Polygonum sachalinense F. Schmidt ex Maxim.
  giant knotweed
Polygonum setaceum Baldw.
  bog smartweed
Polygonum setaceum var. setaceum Baldw.
  bog smartweed
Polygonum viviparum L.
  alpine bistort
Rumex acetosella L.
  common sheep sorrel
Rumex aquaticus L.
  western dock
Rumex aquaticus var. fenestratus (Greene) Dorn
  western dock
Rumex conglomeratus Murr.
  clustered dock
Rumex crispus L.
  curly dock
Rumex maritimus L.
  golden dock
Rumex obtusifolius L.
  bitter dock
Rumex patientia L.
  patience dock
Rumex paucifolius Nutt.
  fewleaved dock
Rumex paucifolius ssp. paucifolius Nutt.
  fewleaved dock
Rumex salicifolius Weinm.
  willow dock
Rumex salicifolius var. angustivalvis Danser
  willow dock
Rumex salicifolius var. mexicanus (Meisn.) C.L. Hitchc.
  Mexican dock
Rumex salicifolius var. transitorius (Rech. f.) Hickman
  willow dock
Rumex sanguineus L.
  redvein dock
Rumex venosus Pursh
  veiny dock

POLYPODIACEAE
Polypodium amorphum Suksdorf
  irregular polypody
Polypodium glycyrrhiza D.C. Eat.
  licorice fern
Polypodium hesperium Maxon
  western polypody
Polypodium scouleri Hook. & Grev.
  leathery polypody

PONTEDERIACEAE
Heteranthera dubia (Jacq.) MacM.
  grassleaf mudplantain

PORTULACACEAE
Calandrinia ciliata (Ruiz & Pavon) DC.
  fringed redmaids
Cistanthe tweedyi (Gray) Hershkovitz
  Tweedy's pussypaws
Cistanthe umbellata (Torr.) Hershkovitz
  Mt. Hood pussypaws
Claytonia arenicola Henderson
  sand springbeauty
Claytonia cordifolia S. Wats.
  heartleaf springbeauty
Claytonia exigua Torr. & Gray
Claytonia exigua ssp. exigua Torr. & Gray
Claytonia lanceolata Pursh
  lanceleaf springbeauty
Claytonia lanceolata var. chrysantha (Greene) C.L. Hitchc.
  lanceleaf springbeauty
Claytonia lanceolata var. lanceolata Pursh
  lanceleaf springbeauty
Claytonia lanceolata var. pacifica McNeill
  Pacific springbeauty
Claytonia megarhiza (Gray) Parry ex S. Wats.
  alpine springbeauty
Claytonia megarhiza var. nivalis (English) C.L. Hitchc.
  alpine springbeauty
Claytonia parviflora Dougl. ex Hook.
  streambank springbeauty
Claytonia perfoliata Donn ex Willd.
  miner's lettuce
Claytonia perfoliata ssp. perfoliata Donn ex Willd.
  miner's lettuce
Claytonia perfoliata ssp. perfoliata var. perfoliata Donn ex Willd.
  miner's lettuce
Claytonia rubra (T.J. Howell) Tidestrom
  redstem springbeauty
Claytonia sibirica L.
  Siberian springbeauty
Claytonia sibirica var. bulbifera Gray
  Siberian springbeauty
Claytonia sibirica var. sibirica L.
  Siberian springbeauty
Claytonia spathulata Dougl. ex Hook.
  pale springbeauty
Claytonia spathulata var. spathulata Dougl. ex Hook.
  pale springbeauty
Lewisia columbiana (T.J. Howell ex Gray) B.L. Robins.
  Columbian bitterroot
Lewisia columbiana var. columbiana (T.J. Howell ex Gray) B.L. Robins.
  Columbian bitterroot
Lewisia columbiana var. rupicola (English) C.L. Hitchc.
  Columbian bitterroot
Lewisia nevadensis (Gray) B.L. Robins.
  Nevada bitterroot
Lewisia pygmaea (Gray) B.L. Robins.
  pigmy bitterroot
Lewisia rediviva Pursh
  Oregon bitterroot
Lewisia rediviva var. rediviva Pursh
  Oregon bitterroot
Lewisia triphylla (S. Wats.) B.L. Robins.
  threeleaf lewisia
Montia chamissoi (Ledeb. ex Spreng.) Greene
  water minerslettuce
Montia dichotoma (Nutt.) T.J. Howell
  dwarf minerslettuce
Montia diffusa (Nutt.) Greene
  spreading minerslettuce
Montia fontana L.
  annual water minerslettuce
Montia fontana ssp. fontana L.
  annual water minerslettuce
Montia howellii S. Wats.
  Howell's minerslettuce
Montia linearis (Dougl. ex Hook.) Greene
  narrowleaf minerslettuce
Montia parvifolia (Moc. ex DC.) Greene
  littleleaf minerslettuce
Montia parvifolia ssp. flagellaris (Bong.) Ferris
  littleleaf minerslettuce
Montia parvifolia ssp. parvifolia (Moc. ex DC.) Greene
  littleleaf minerslettuce
Montia perfoliata (Donn ex Willd.) T.J. Howell
  = Claytonia perfoliata ssp. perfoliata
Portulaca oleracea L.
  little hogweed
Talinum sediforme Poelln.
  Okanogan fameflower
Talinum spinescens Torr.
  spiny fameflower

POTAMOGETONACEAE
Potamogeton alpinus Balbis
  alpine pondweed
Potamogeton amplifolius Tuckerman
  largeleaf pondweed
Potamogeton crispus L.
  curly pondweed
Potamogeton epihydrus Raf.
  ribbonleaf pondweed
Potamogeton filiformis Pers.
  fineleaf pondweed
Potamogeton foliosus Raf.
  leafy pondweed
Potamogeton foliosus var. fibrillosus (Fern.) Haynes & Reveal
  leafy pondweed
Potamogeton foliosus var. foliosus Raf.
  leafy pondweed
Potamogeton friesii Rupr.
  Fries' pondweed
Potamogeton gramineus L.
  variableleaf pondweed
Potamogeton illinoensis Morong
  Illinois pondweed
Potamogeton natans L.
  floating pondweed
Potamogeton nodosus Poir.
  longleaf pondweed
Potamogeton obtusifolius Mert. & Koch
  bluntleaf pondweed
Potamogeton pectinatus L.
  sago pondweed
Potamogeton praelongus Wulfen
  whitestem pondweed
Potamogeton pusillus L.
  small pondweed
Potamogeton pusillus var. pusillus L.
  small pondweed
Potamogeton pusillus var. tenuissimus Mert. & Koch
  small pondweed
Potamogeton richardsonii (Benn.) Rydb.
  Richardson's pondweed
Potamogeton robbinsii Oakes
  Robbins' pondweed
Potamogeton vaginatus Turcz.
  sheathed pondweed
Potamogeton zosteriformis Fern.
  flatstem pondweed

PRIMULACEAE
Anagallis arvensis L.
  scarlet pimpernel
Anagallis minima (L.) Krause
  chaffweed
Androsace filiformis Retz.
  filiform rockjasmine
Androsace septentrionalis L.
  pygmyflower rockjasmine
Dodecatheon conjugens Greene
  Bonneville shootingstar
Dodecatheon conjugens ssp. viscidum (Piper) H.J. Thompson
  Bonneville shootingstar
Dodecatheon conjugens var. conjugens Greene
  Bonneville shootingstar
Dodecatheon dentatum Hook.
  white shootingstar
Dodecatheon hendersonii Gray
  mosquito bills
Dodecatheon hendersonii ssp. hendersonii Gray
  Henderson's shootingstar
Dodecatheon jeffreyi Van Houtte
  tall mountain shootingstar
Dodecatheon jeffreyi ssp. jeffreyi Van Houtte
  Jeffrey's shootingstar
Dodecatheon meadia L.
  pride of Ohio
Dodecatheon meadia ssp. meadia L.
  pride of Ohio
Dodecatheon poeticum Henderson
  poet's shootingstar
Dodecatheon pulchellum (Raf.) Merr.
  darkthroat shootingstar
Dodecatheon pulchellum ssp. cusickii (Greene) Calder & Taylor
  Cusick's shootingstar
Dodecatheon pulchellum ssp. macrocarpum (Gray) Taylor & MacBryde
  darkthroat shootingstar
Dodecatheon pulchellum ssp. pulchellum (Raf.) Merr.
  darkthroat shootingstar
Douglasia laevigata Gray
  cliff dwarfprimrose
Douglasia laevigata var. ciliolata Constance
  cliff dwarfprimrose
Douglasia laevigata var. laevigata Gray
  cliff dwarfprimrose
Douglasia nivalis Lindl.
  snow dwarfprimrose
Douglasia nivalis var. dentata (S. Wats.) Gray
  snow dwarfprimrose
Douglasia nivalis var. nivalis Lindl.
  snow dwarfprimrose
Glaux maritima L.
  sea milkwort
Lysimachia ciliata L.
  fringed loosestrife
Lysimachia hybrida Michx.
  lowland yellow loosestrife
Lysimachia nummularia L.
  creeping jenny
Lysimachia punctata L.
  large yellow loosestrife
Lysimachia terrestris (L.) B.S.P.
  earth loosestrife
Lysimachia thyrsiflora L.
  tufted loosestrife
Samolus valerandi L.
  seaside brookweed
Samolus valerandi ssp. parviflorus (Raf.) Hulten
  seaside brookweed
Trientalis borealis Raf.
  American starflower
Trientalis borealis ssp. latifolia (Hook.) Hulten
  broadleaf starflower
Trientalis europaea L.
  arctic starflower
Trientalis europaea ssp. arctica (Fisch. ex Hook.) Hulten
  arctic starflower

PTERIDACEAE
Adiantum aleuticum (Rupr.) Paris
  Aleutian maidenhair
Adiantum pedatum
  = Adiantum aleuticum
Aspidotis densa (Brack.) Lellinger
  Indian's dream
Cheilanthes feei T. Moore
  slender lipfern
Cheilanthes gracillima D.C. Eat.
  lace lipfern
Cheilanthes lanosa (Michx.) D.C. Eat.
  hairy lipfern
Cryptogramma R. Br.
  rockbrake
Cryptogramma acrostichoides R. Br.
  American rockbrake
Cryptogramma stelleri (Gmel.) Prantl
  fragile rockbrake
Pellaea brachyptera (T. Moore) Baker
  Sierran cliffbrake
Pellaea breweri D.C. Eat.
  Brewer's cliffbrake
Pellaea glabella Mett. ex Kuhn
  dwarf cliffbrake
Pellaea glabella ssp. occidentalis (E. Nels.) Windham
  western dwarf cliffbrake
Pellaea glabella ssp. simplex (Butters) A.& D. Love
  smooth cliffbrake
Pentagrama Yatskievych, Windham & Wollenweber
  gold fern
Pentagrama triangularis (Kaulfuss) Yatskievych, Windham & Wollenweber
  western goldfern
Pentagrama triangularis ssp. triangularis (Kaulfuss) Yatskievych, Windham & Wollenweber
  western goldfern

RANUNCULACEAE
Aconitum columbianum Nutt.
  Columbian monkshood
Aconitum columbianum ssp. columbianum Nutt.
Aconitum columbianum var. columbianum Nutt.
  Columbian monkshood
Actaea arguta Nutt.
  = Actaea rubra ssp. arguta
Actaea rubra (Ait.) Willd.
  red baneberry
Actaea rubra ssp. arguta (Nutt.) Hulten
  red baneberry
Adonis annua L.
  blooddrops
Anemone deltoidea Hook.
  Columbian windflower
Anemone drummondii S. Wats.
  Drummond's anemone
Anemone drummondii ssp. drummondii S. Wats.
  Drummond's anemone
Anemone ludoviciana Nutt.
  = Pulsatilla patens ssp. multifida
Anemone lyallii Britt.
  Little Mountain thimbleweed
Anemone multifida (Pritz.) Zamels, non Poir.
  = Pulsatilla patens ssp. multifida
Anemone multifida Poir.
  Pacific anemone
Anemone multifida var. hirsuta C.L. Hitchc.
  Pacific anemone
Anemone multifida var. hudsoniana DC.
  Hudson's anemone
Anemone multifida var. multifida Poir.
  Pacific anemone
Anemone nuttalliana DC.
  = Pulsatilla patens ssp. multifida
Anemone occidentalis S. Wats.
  = Pulsatilla occidentalis
Anemone oregana Gray
  blue windflower
Anemone oregana var. felix (M.E. Peck) C.L. Hitchc.
  Felix anemone
Anemone oregana var. oregana Gray
  blue windflower
Anemone parviflora Michx.
  smallflowered anemone
Anemone patens var. multifida Pritz.
  = Pulsatilla patens ssp. multifida
Anemone patens var. nuttalliana (DC.) Gray
  = Pulsatilla patens ssp. multifida
Anemone patens var. wolfgangiana (Bess. ex Richards) Trauvtr. & Mey ex F. Kurtz
  = Pulsatilla patens ssp. multifida
Anemone piperi Britt. ex Rydb.
  Piper's anemone
Aquilegia flavescens S. Wats.
  yellow columbine
Aquilegia formosa Fisch. ex DC.
  western columbine
Aquilegia formosa var. formosa Fisch. ex DC.
  crimson columbine
Aquilegia formosa var. wawawensis (Payson) St. John
  Wawaw columbine
Caltha biflora DC.
  = Caltha leptosepala ssp. howellii
Caltha leptosepala DC.
  white marshmarigold
Caltha leptosepala ssp. howellii (Huth) P.G. Sm.
  Howell's marshmarigold
Caltha leptosepala ssp. leptosepala DC.
  white marshmarigold
Caltha leptosepala ssp. leptosepala var. leptosepala DC.
  white marshmarigold
Ceratocephala testiculata (Crantz) Bess.
  curveseed butterwort
Cimicifuga elata Nutt.
  tall bugbane
Cimicifuga laciniata S. Wats.
  Mt. Hood bugbane
Clematis columbiana (Nutt.) Torr. & Gray
  rock clematis
Clematis columbiana var. columbiana (Nutt.) Torr. & Gray
  rock clematis
Clematis hirsutissima Pursh
  hairy clematis
Clematis ligusticifolia Nutt.
  western white clematis
Clematis ligusticifolia var. brevifolia Nutt.
  western white clematis
Clematis ligusticifolia var. ligusticifolia Nutt.
  western white clematis
Clematis occidentalis (Hornem.) DC.
  western blue virginsbower
Clematis occidentalis var. dissecta (C.L. Hitchc.) J. Pringle
  western blue virginsbower
Clematis pseudoalpina (Kuntze) A. Nels.
  = Clematis columbiana var. columbiana
Clematis vitalba L.
  evergreen clematis
Consolida ajacis (L.) Schur
  doubtful knight's spur
Coptis aspleniifolia Salisb.
  fernleaf goldthread
Coptis laciniata Gray
  Oregon goldthread
Coptis occidentalis (Nutt.) Torr. & Gray
  Idaho goldthread
Delphinium X burkei Greene
  Burk larkspur
Delphinium X occidentale (S. Wats.) S. Wats.
  duncecap larkspur
Delphinium bicolor Nutt.
  little larkspur
Delphinium depauperatum Nutt.
  slim larkspur
Delphinium glareosum Greene
  Olympic larkspur
Delphinium glareosum ssp. caprorum (Ewan) Ewan
  Olympic larkspur
Delphinium glareosum ssp. glareosum Greene
  Olympic larkspur
Delphinium glaucum S. Wats.
  Sierra larkspur
Delphinium menziesii DC.
  Menzies' larkspur
Delphinium menziesii ssp. menziesii DC.
  Menzies' larkspur
Delphinium multiplex (Ewan) C.L. Hitchc.
  kittitas larkspur
Delphinium nuttallianum Pritz. ex Walp.
  Nuttal's larkspur
Delphinium nuttallianum var. fulvum C.L. Hitchc.
  yellow larkspur
Delphinium nuttallianum var. lineapetalum (Ewan) C.L. Hitchc.
  Nuttal's larkspur
Delphinium nuttallianum var. nuttallianum Pritz. ex Walp.
  Nuttal's larkspur
Delphinium nuttallii Gray
  Nuttall's larkspur
Delphinium nuttallii ssp. ochroleucum (Nutt.) Warnock
Delphinium occidentale ssp. occidentale (S. Wats.) S. Wats.
  duncecap larkspur
Delphinium stachydeum (Gray) Tidestrom
  Rocky Mountain larkspur
Delphinium trolliifolium Gray
  Columbian larkspur
Delphinium viridescens Leib.
  Wenatchee larkspur
Delphinium xantholeucum Piper
  yellow white larkspur
Enemion hallii (Gray) Drumm. & Hutchinson
  Willamette false rue anemone
Kumlienia cooleyae (Vasey & Rose) Greene
  Cooley's buttercup
Myosurus aristatus Benth.
  bristle mousetail
Myosurus minimus ssp. major (Greene) Campbell
  tiny mousetail
Myosurus minimus ssp. major var. major (Greene) K.C. Davis
  tiny mousetail
Myosurus minimus ssp. minimus L.
  tiny mousetail
Myosurus minumus L.
  tiny mousetail
Pulsatilla hirsutissima (Pursh) Britt.
  = Pulsatilla patens ssp. multifida
Pulsatilla ludoviciana Heller
  = Pulsatilla patens ssp. multifida
Pulsatilla nuttalliana (DC.) Spreng.
  = Pulsatilla patens ssp. multifida
Pulsatilla occidentalis (S. Wats.) Freyn
  white pasqueflower
Pulsatilla patens (L.) P. Mill.
  American pasqueflower
Pulsatilla patens ssp. hirsutissima (Pursh) Zamels
  = Pulsatilla patens ssp. multifida
Pulsatilla patens ssp. multifida (Pritz.) Zamels
  cutleaf anemone
Ranunculus abortivus L.
  littleleaf buttercup
Ranunculus abortivus var. abortivus L.
  littleleaf buttercup
Ranunculus acris L.
  tall buttercup
Ranunculus acris var. acris L.
  showy buttercup
Ranunculus alismifolius Geyer ex Benth.
  plantainleaf buttercup
Ranunculus alismifolius var. alismellus Gray
  plantainleaf buttercup
Ranunculus alismifolius var. alismifolius Geyer ex Benth.
  plantainleaf buttercup
Ranunculus aquatilis L.
  whitewater crowfoot
Ranunculus arvensis L.
  corn buttercup
Ranunculus bulbosus L.
  St. Anthony's turnip
Ranunculus californicus Benth.
  California buttercup
Ranunculus cardiophyllus Hook.
  heartleaf buttercup
Ranunculus cymbalaria Pursh
  alkali buttercup
Ranunculus cymbalaria var. cymbalaria Pursh
  alkali buttercup
Ranunculus cymbalaria var. saximontanus Fern.
  Rocky Mountain buttercup
Ranunculus eschscholtzii Schlecht.
  Eschscholtz's buttercup
Ranunculus eschscholtzii var. eschscholtzii Schlecht.
  Eschscholtz's buttercup
Ranunculus ficaria L.
  fig buttercup
Ranunculus flabellaris Raf.
  yellow water buttercup
Ranunculus flammula L.
  spearwort buttercup
Ranunculus flammula var. filiformis (Michx.) Hook.
  flam buttercup
Ranunculus flammula var. flammula L.
  flam buttercup
Ranunculus glaberrimus Hook.
  sagebrush buttercup
Ranunculus glaberrimus var. ellipticus (Greene) Greene
  elliptical buttercup
Ranunculus glaberrimus var. glaberrimus Hook.
  sagebrush buttercup
Ranunculus glaberrimus var. reconditus L. Benson
  sagebrush buttercup
Ranunculus gmelinii DC.
  Gmelin's buttercup
Ranunculus gmelinii var. limosus (Nutt.) Hara
  Gmelin's buttercup
Ranunculus gmelinii var. purshii (Richards.) Hara
  Pursh's buttercup
Ranunculus hebecarpus Hook. & Arn.
  delicate buttercup
Ranunculus inamoenus Greene
  graceful buttercup
Ranunculus inamoenus var. alpeophilus (A. Nels.) L. Benson
  graceful buttercup
Ranunculus inamoenus var. inamoenus Greene
  graceful buttercup
Ranunculus longirostris Godr.
  longbeak buttercup
Ranunculus macounii Britt.
  Macoun's buttercup
Ranunculus muricatus L.
  spinyfruit buttercup
Ranunculus occidentalis Nutt.
  western buttercup
Ranunculus occidentalis var. occidentalis Nutt.
  western buttercup
Ranunculus orthorhynchus Hook.
  straightbeak buttercup
Ranunculus orthorhynchus var. orthorhynchus Hook.
  straightbeak buttercup
Ranunculus pensylvanicus L. f.
  Pennsylvania buttercup
Ranunculus populago Greene
  popular buttercup
Ranunculus recurvatus Poir.
  blisterwort
Ranunculus repens L.
  creeping buttercup
Ranunculus repens var. degeneratus Schur
  creeping buttercup
Ranunculus repens var. glabratus DC.
  creeping buttercup
Ranunculus repens var. repens L.
  creeping buttercup
Ranunculus sceleratus L.
  celeryleaf buttercup
Ranunculus sceleratus var. multifidus Nutt.
  blister buttercup
Ranunculus sceleratus var. sceleratus L.
  cursed buttercup
Ranunculus suksdorfii Gray
  Suksdorf's buttercup
Ranunculus trichophyllus Chaix
  whitewater crowfoot
Ranunculus trichophyllus var. trichophyllus Chaix
  hairleaf water buttercup
Ranunculus uncinatus D. Don ex G. Don
  hooked buttercup
Ranunculus uncinatus var. parviflorus (Torr.) L. Benson
  common Idaho buttercup
Ranunculus uncinatus var. uncinatus D. Don ex G. Don
  woodland buttercup
Ranunculus verecundus B.L. Robins. ex Piper
  wetslope buttercup
Thalictrum dasycarpum Fisch. & Ave-Lall.
  purple meadowrue
Thalictrum fendleri Engelm. ex Gray
  Fendler's meadowrue
Thalictrum occidentale Gray
  western meadowrue
Thalictrum occidentale var. occidentale Gray
  western meadowrue
Thalictrum sparsiflorum Turcz. ex Fisch. & C.A. Mey.
  fewflower meadowrue
Thalictrum venulosum Trel.
  veiny meadowrue
Trautvetteria caroliniensis (Walt.) Vail
  Carolina bugbane
Trollius laxus Salisb.
  American globeflower
Trollius laxus ssp. albiflorus (Gray) A.& D. Love & Kapoor
  American globeflower

RHAMNACEAE
Ceanothus integerrimus Hook. & Arn.
  deerbrush
Ceanothus prostratus Benth.
  squawcarpet
Ceanothus prostratus ssp. prostratus Benth.
  squawcarpet
Ceanothus sanguineus Pursh
  redstem ceanothus
Ceanothus velutinus Dougl. ex Hook.
  snowbrush ceanothus
Ceanothus velutinus ssp. hookeri (M.C. Johnston) C. Schmidt
  Hooker's ceanothus
Ceanothus velutinus ssp. velutinus Dougl. ex Hook.
  tobacco brush
Frangula purshiana (DC.) Cooper
  Pursh's buckthorn
Rhamnus alnifolia L'Her.
  alderleaf buckthorn
Rhamnus purshiana DC.
  = Frangula purshiana

ROSACEAE
Agrimonia gryposepala Wallr.
  tall hairy agrimony
Alchemilla 
  = Aphanes 
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roemer
  Saskatoon serviceberry
Amelanchier alnifolia var. alnifolia (Nutt.) Nutt. ex M. Roemer
  Saskatoon serviceberry
Amelanchier alnifolia var. cusickii (Fern.) C.L. Hitchc.
  Cusick's serviceberry
Amelanchier alnifolia var. humptulipensis (G.N. Jones) C.L. Hitchc.
  Saskatoon serviceberry
Amelanchier alnifolia var. semiintegrifolia (Hook.) C.L. Hitchc.
  Pacific serviceberry
Amelanchier pallida Greene
  pale serviceberry
Amelanchier pumila (Torr. & Gray) Nutt. ex M. Roemer
  dwarf serviceberry
Amelanchier utahensis Koehne
  Utah serviceberry
Amelanchier utahensis ssp. utahensis Koehne
  Utah serviceberry
Aphanes arvensis L.
  field parsley piert
Argentina anserina (L.) Rydb.
  silverweed cinquefoil
Argentina egedii (Wormsk.) Rydb.
  Pacific silverweed
Argentina egedii ssp. egedii (Wormsk.) Rydb.
  Eged's Pacific silverweed
Aruncus dioicus (Walt.) Fern.
  bride's feathers
Aruncus dioicus var. vulgaris (Maxim.) Hara
  bride's feathers
Cercocarpus ledifolius Nutt.
  curlleaf mountain mahogany
Cercocarpus ledifolius var. intercedens Schneid.
  curlleaf mountain mahogany
Cercocarpus ledifolius var. ledifolius Nutt.
  curlleaf mountain mahogany
Comarum palustre L.
  purple marshlocks
Crataegus columbiana T.J. Howell
  = Crataegus douglasii var. douglasii
Crataegus douglasii Lindl.
  black hawthorn
Crataegus douglasii var. douglasii Lindl.
  Douglas' hawthorn
Dryas drummondii Richards. ex Hook.
  Drummond's dryad
Dryas octopetala L.
  white dryad
Dryas octopetala ssp. hookeriana (Juz.) Hulten
  Hooker's mountainavens
Duchesnea indica (Andr.) Focke
  Indian strawberry
Filipendula occidentalis (S. Wats.) T.J. Howell
  meadowsweet
Fragaria X ananassa Duchesne (pro sp.)
  hybrid strawberry
Fragaria X ananassa var. ananassa Duchesne (pro sp.)
  hybrid strawberry
Fragaria X ananassa var. cuneifolia (Nutt. ex T.J. Howell) Staudt (pro nm.)
  hybrid strawberry
Fragaria chiloensis (L.) P. Mill.
  beach strawberry
Fragaria crinita Rydb.
  Pacific strawberry
Fragaria vesca L.
  woodland strawberry
Fragaria vesca ssp. bracteata (Heller) Staudt
  woodland strawberry
Fragaria virginiana Duchesne
  Virginia strawberry
Fragaria virginiana ssp. platypetala (Rydb.) Staudt
  Virginia strawberry
Geum aleppicum Jacq.
  yellow avens
Geum macrophyllum Willd.
  largeleaf avens
Geum macrophyllum var. macrophyllum Willd.
  largeleaf avens
Geum macrophyllum var. perincisum (Rydb.) Raup
  largeleaf avens
Geum rivale L.
  purple avens
Geum rossii (R. Br.) Ser.
  Ross' avens
Geum rossii var. depressum (Greene) C.L. Hitchc.
  Ross' avens
Geum triflorum Pursh
  prairiesmoke
Geum triflorum var. campanulatum (Greene) C.L. Hitchc.
  old man's whiskers
Geum triflorum var. ciliatum (Pursh) Fassett
  old man's whiskers
Holodiscus discolor (Pursh) Maxim.
  oceanspray
Horkelia fusca Lindl.
  tawny horkelia
Horkelia fusca ssp. capitata (Lindl.) Keck
  bighead horkelia
Horkelia fusca ssp. fusca Lindl.
  pinewoods honeydew
Horkelia fusca ssp. parviflora (Nutt. ex Torr. & Gray) Keck
  smallflower horkelia
Ivesia gordonii (Hook.) Torr. & Gray
  Gordon's ivesia
Ivesia tweedyi Rydb.
  Tweedy's ivesia
Luetkea pectinata (Pursh) Kuntze
  partridgefoot
Malus fusca (Raf.) Schneid.
  Oregon crabapple
Malus sylvestris P. Mill.
  apple
Oemleria cerasiformis (Torr. & Gray ex Hook. & Arn.) Landon
  Indian plum
Pentaphylloides floribunda (Pursh) A. Love
  shrubby cinquefoil
Petrophyton cinerascens (Piper) Rydb.
  halfshrub rockmat
Petrophyton hendersonii (Canby) Rydb.
  Olympic Mountain rockmat
Physocarpus capitatus (Pursh) Kuntze
  Pacific ninebark
Physocarpus malvaceus (Greene) Kuntze
  mallow ninebark
Potentilla anserina L.
  = Argentina anserina
Potentilla argentea L.
  silver cinquefoil
Potentilla argentea var. argentea L.
  silver cinquefoil
Potentilla arguta Pursh
  tall cinquefoil
Potentilla arguta ssp. convallaria (Rydb.) Keck
  cream cinquefoil
Potentilla biennis Greene
  biennial cinquefoil
Potentilla diversifolia Lehm.
  varileaf cinquefoil
Potentilla diversifolia var. diversifolia Lehm.
  varileaf cinquefoil
Potentilla diversifolia var. perdissecta (Rydb.) C.L. Hitchc.
  mountainmeadow cinquefoil
Potentilla drummondii Lehm.
  Drummond's cinquefoil
Potentilla drummondii ssp. breweri (S. Wats.) Ertter
Potentilla egedii Wormsk.
  = Argentina egedii ssp. egedii
Potentilla flabellifolia Hook. ex Torr. & Gray
  high mountain cinquefoil
Potentilla fruticosa auct. non L.
  = Pentaphylloides floribunda
Potentilla glandulosa Lindl.
  gland cinquefoil
Potentilla glandulosa ssp. glabrata (Rydb.) Keck
  sticky cinquefoil
Potentilla glandulosa ssp. glandulosa Lindl.
  sticky cinquefoil
Potentilla glandulosa ssp. pseudorupestris (Rydb.) Keck
  sticky cinquefoil
Potentilla gracilis Dougl. ex Hook.
  northwest cinquefoil
Potentilla gracilis var. brunnescens (Rydb.) C.L. Hitchc.
  brownfuz cinquefoil
Potentilla gracilis var. fastigiata (Nutt.) S. Wats.
Potentilla gracilis var. flabelliformis (Lehm.) Nutt. ex Torr. & Gray
Potentilla gracilis var. gracilis Dougl. ex Hook.
  graceful cinquefoil
Potentilla nana Willd. ex Schlecht.
  arctic cinquefoil
Potentilla newberryi Gray
  Newberry's cinquefoil
Potentilla nivea L.
  snow cinquefoil
Potentilla nivea var. nivea L.
  snow cinquefoil
Potentilla nivea var. pentaphylla Lehm.
  fiveleaf cinquefoil
Potentilla norvegica L.
  Norwegian cinquefoil
Potentilla norvegica ssp. hirsuta (Michx.) Hyl.
  Norwegian cinquefoil
Potentilla norvegica ssp. monspeliensis (L.) Aschers. & Graebn.
  Norwegian cinquefoil
Potentilla pacifica T.J. Howell
  = Argentina egedii ssp. egedii
Potentilla palustris (L.) Scop.
  = Comarum palustre
Potentilla paradoxa Nutt.
  Paradox cinquefoil
Potentilla pectinisecta Rydb.
  combleaf cinquefoil
Potentilla pensylvanica L.
  Pennsylvania cinquefoil
Potentilla pensylvanica var. strigosa Pallas ex Pursh
  Pennsylvania cinquefoil
Potentilla pulcherrima Lehm.
  beautiful cinquefoil
Potentilla recta L.
  sulphur cinquefoil
Potentilla rivalis Nutt.
  brook cinquefoil
Potentilla rivalis var. millegrana (Engelm. ex Lehm.) S. Wats.
  brook cinquefoil
Potentilla rivalis var. rivalis Nutt.
  brook cinquefoil
Potentilla uniflora Ledeb.
  oneflower cinquefoil
Potentilla villosa Pallas ex Pursh
  villous cinquefoil
Prunus avium (L.) L.
  sweet cherry
Prunus cerasus L.
  sour cherry
Prunus domestica L.
  European plum
Prunus emarginata (Dougl. ex Hook.) Walp.
  bitter cherry
Prunus emarginata var. emarginata (Dougl. ex Hook.) Walp.
  bitter cherry
Prunus emarginata var. mollis (Dougl. ex Hook.) Brewer
  bitter cherry
Prunus mahaleb L.
  Mahaleb cherry
Prunus melanocarpa (A. Nels.) Rydb.
  = Prunus virginiana var. melanocarpa
Prunus spinosa L.
  blackthorn
Prunus virginiana L.
  common chokecherry
Prunus virginiana var. demissa (Nutt.) Torr.
  western chokecherry
Prunus virginiana var. melanocarpa (A. Nels.) Sarg.
  black chokecherry
Purshia tridentata (Pursh) DC.
  antelope bitterbrush
Pyrus communis L.
  common pear
Rosa canina L.
  dog rose
Rosa eglanteria L.
  sweetbriar rose
Rosa gymnocarpa Nutt.
  dwarf rose
Rosa gymnocarpa var. gymnocarpa Nutt.
  wood rose
Rosa multiflora Thunb. ex Murr.
  multiflora rose
Rosa nutkana K. Presl
  Nootka rose
Rosa nutkana var. hispida Fern.
  bristly Nootka rose
Rosa nutkana var. muriculata (Greene) G.N. Jones
  Nootka rose
Rosa nutkana var. nutkana K. Presl
  Nootka rose
Rosa nutkana var. setosa G.N. Jones
  Nootka rose
Rosa pisocarpa Gray
  cluster rose
Rosa rugosa Thunb.
  rugosa rose
Rosa woodsii Lindl.
  Woods' rose
Rosa woodsii var. ultramontana (S. Wats.) Jepson
  Woods' rose
Rubus arcticus L.
  arctic blackberry
Rubus arcticus ssp. acaulis (Michx.) Focke
  dwarf raspberry
Rubus discolor Weihe & Nees
  Himalayan blackberry
Rubus idaeus L.
  American red raspberry
Rubus idaeus ssp. idaeus L.
  common red raspberry
Rubus idaeus ssp. strigosus (Michx.) Focke
  grayleaf red raspberry
Rubus laciniatus Willd.
  cutleaf blackberry
Rubus lasiococcus Gray
  roughfruit berry
Rubus leucodermis Dougl. ex Torr. & Gray
  whitebark raspberry
Rubus leucodermis var. leucodermis Dougl. ex Torr. & Gray
  whitebark raspberry
Rubus macrophyllus Weihe & Nees
  largeleaf blackberry
Rubus nigerrimus (Greene) Rydb.
  dark raspberry
Rubus nivalis Dougl. ex Hook.
  snow raspberry
Rubus parviflorus Nutt.
  thimbleberry
Rubus parviflorus var. parviflorus Nutt.
  western thimbleberry
Rubus pedatus Sm.
  strawberryleaf raspberry
Rubus pubescens Raf.
  dwarf red blackberry
Rubus spectabilis Pursh
  salmonberry
Rubus strigosus Michx.
  = Rubus idaeus ssp. strigosus
Rubus ursinus Cham. & Schlecht.
  California blackberry
Rubus ursinus ssp. macropetalus (Dougl. ex Hook.) Taylor & MacBryde
  California blackberry
Rubus vestitus Weihe & Nees
  European blackberry
Sanguisorba menziesii Rydb.
  Menzies' burnet
Sanguisorba minor Scop.
  small burnet
Sanguisorba occidentalis Nutt.
  western burnet
Sanguisorba officinalis L.
  official burnet
Sibbaldia procumbens L.
  creeping sibbaldia
Sorbaria arborea Schneid.
  sorbaria
Sorbus aucuparia L.
  European mountainash
Sorbus scopulina Greene
  Greene mountainash
Sorbus scopulina var. cascadensis (G.N. Jones) C.L. Hitchc.
  Cascade mountainash
Sorbus scopulina var. scopulina Greene
  Cascade mountainash
Sorbus sitchensis M. Roemer
  western mountainash
Sorbus sitchensis var. grayi (Wenzig) C.L. Hitchc.
  Gray's mountainash
Sorbus sitchensis var. sitchensis M. Roemer
  Sitka mountainash
Spiraea X pyramidata Greene (pro sp.)
  pyramid spirea
Spiraea betulifolia Pallas
  white spirea
Spiraea betulifolia var. lucida (Dougl. ex Greene) C.L. Hitchc.
  shinyleaf spirea
Spiraea discolor Pursh
  = Holodiscus discolor
Spiraea douglasii Hook.
  Douglas' spirea
Spiraea douglasii var. douglasii Hook.
  rose spirea
Spiraea douglasii var. menziesii (Hook.) K. Presl
  Menzies' spirea
Spiraea splendens Baumann ex K. Koch
  rose meadowsweet
Spiraea splendens var. splendens Baumann ex K. Koch
  mountain spirea
Spiraea tomentosa L.
  steeplebush

RUBIACEAE
Galium aparine L.
  stickywilly
Galium bifolium S. Wats.
  twinleaf bedstraw
Galium boreale L.
  northern bedstraw
Galium divaricatum Pourret ex Lam.
  Lamarck's bedstraw
Galium kamtschaticum Steller ex J.A. & J.H. Schultes
  boreal bedstraw
Galium mexicanum Kunth
  Mexican bedstraw
Galium mexicanum ssp. asperulum (Gray) Dempster
  Mexican bedstraw
Galium mollugo L.
  false baby's breath
Galium multiflorum Kellogg
  shrubby bedstraw
Galium odoratum (L.) Scop.
  sweetscented bedstraw
Galium oreganum Britt.
  Oregon bedstraw
Galium parisiense L.
  wall bedstraw
Galium serpenticum Dempster
  Intermountain bedstraw
Galium serpenticum ssp. puberulum (Piper) Dempster & Ehrend.
  Intermountain bedstraw
Galium sylvaticum L.
  scotchmist
Galium tricornutum Dandy
  roughfruit corn bedstraw
Galium trifidum L.
  threepetal bedstraw
Galium trifidum ssp. columbianum (Rydb.) Hulten
  threepetal bedstraw
Galium trifidum ssp. subbiflorum (Wieg.) Piper
  threepetal bedstraw
Galium triflorum Michx.
  fragrant bedstraw
Galium verum L.
  Yellow Spring bedstraw
Galium watsonii (Gray) Heller
  Watson's bedstraw
Kelloggia galioides Torr.
  milk kelloggia
Sherardia arvensis L.
  blue fieldmadder

RUPPIACEAE
Ruppia maritima L.
  widgeongrass

SALICACEAE
Populus balsamifera L.
  balsam poplar
Populus balsamifera ssp. trichocarpa (Torr. & Gray ex Hook.) Brayshaw
  black cottonwood
Populus tremuloides Michx.
  quaking aspen
Populus trichocarpa Torr. & Gray ex Hook.
  = Populus balsamifera ssp. trichocarpa
Salix X fluviatilis Nutt.
  river willow
Salix amygdaloides Anderss.
  peachleaf willow
Salix arctica R. Br. ex Richards.
Salix barclayi Anderss.
  Barclay's willow
Salix bebbiana Sarg.
  Bebb willow
Salix boothii Dorn
  Booth's willow
Salix brachycarpa Nutt.
  barrenground willow
Salix brachycarpa ssp. brachycarpa Nutt.
  barrenground willow
Salix brachycarpa ssp. brachycarpa var. brachycarpa Nutt.
  barrenground willow
Salix candida Fluegge ex Willd.
  sageleaf willow
Salix cascadensis Cockerell
  cascade willow
Salix commutata Bebb
  undergreen willow
Salix drummondiana Barratt ex Hook.
  Drummond's willow
Salix eastwoodiae Cockerell ex Heller
  mountain willow
Salix geyeriana Anderss.
  Geyer's willow
Salix hookeriana Barratt ex Hook.
  dune willow
Salix lasiolepis Benth.
  arroyo willow
Salix lasiolepis var. lasiolepis Benth.
  Tracy willow
Salix lucida Muhl.
  shining willow
Salix lucida ssp. caudata (Nutt.) E. Murr.
  greenleaf willow
Salix lucida ssp. lasiandra (Benth.) E. Murr.
  Pacific willow
Salix lutea Nutt.
  yellow willow
Salix maccalliana Rowlee
  McCalla's willow
Salix melanopsis Nutt.
  dusky willow
Salix myrtillifolia Anderss.
  blueberry willow
Salix pedicellaris Pursh
  bog willow
Salix planifolia Pursh
  diamondleaf willow
Salix planifolia ssp. planifolia Pursh
  tealeaf willow
Salix prolixa Anderss.
  MacKenzie's willow
Salix reticulata L.
  netleaf willow
Salix reticulata ssp. nivalis (Hook.) A.& D. Love & Kapoor
  snow willow
Salix scouleriana Barratt ex Hook.
  Scouler's willow
Salix sessilifolia Nutt.
  northwest sandbar willow
Salix sitchensis Sanson ex Bong.
  Sitka willow
Salix tweedyi (Bebb ex Rose) Ball
  Tweedy's 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
Geocaulon lividum (Richards.) Fern.
  false toadflax

SARRACENIACEAE
Darlingtonia californica Torr.
  California pitcherplant

SAXIFRAGACEAE
Bolandra oregana S. Wats.
  northern false coolwort
Boykinia intermedia (Piper) G.N. Jones
  Sierran brookfoam
Boykinia occidentalis Torr. & Gray
  coastal brookfoam
Chrysosplenium glechomifolium Nutt.
  Pacific golden saxifrage
Chrysosplenium tetrandrum (Lund ex Malmgr.) Th. Fries
  northern golden saxifrage
Elmera racemosa (S. Wats.) Rydb.
  yellow coralbells
Elmera racemosa var. puberulenta C.L. Hitchc.
  yellow coralbells
Elmera racemosa var. racemosa (S. Wats.) Rydb.
  yellow coralbells
Heuchera chlorantha Piper
  tall alumroot
Heuchera cylindrica Dougl. ex Hook.
  roundleaf alumroot
Heuchera cylindrica var. alpina Sw.
  alpine alumroot
Heuchera cylindrica var. cylindrica Dougl. ex Hook.
  roundleaf alumroot
Heuchera cylindrica var. glabella (Torr. & Gray) Wheelock
  beautiful alumroot
Heuchera cylindrica var. orbicularis (Rosendahl, Butters & Lakela) Calder & Savile
  poker alumroot
Heuchera cylindrica var. septentrionalis Rosendahl, Butters & Lakela
  roundleaf alumroot
Heuchera glabra Willd. ex Roemer & J.A. Schultes
  alpine heuchera
Heuchera grossulariifolia Rydb.
  gooseberryleaf alumroot
Heuchera grossulariifolia var. tenuifolia (Wheelock) C.L. Hitchc.
  gooseberryleaf alumroot
Heuchera micrantha Dougl. ex Lindl.
  crevice alumroot
Heuchera micrantha var. diversifolia (Rydb.) Rosendahl, Butters & Lakela
  crevice alumroot
Heuchera micrantha var. micrantha Dougl. ex Lindl.
  crevice alumroot
Leptarrhena pyrolifolia (D. Don) R. Br. ex Ser.
  fireleaf leptarrhena
Lithophragma glabrum Nutt.
  bulbous woodlandstar
Lithophragma parviflorum (Hook.) Nutt. ex Torr. & Gray
  smallflower woodlandstar
Lithophragma parviflorum var. parviflorum (Hook.) Nutt. ex Torr. & Gray
  smallflower woodlandstar
Lithophragma tenellum Nutt.
  slender woodlandstar
Mitella breweri Gray
  Brewer's miterwort
Mitella caulescens Nutt.
  slightstemmed miterwort
Mitella diversifolia Greene
  angleleaf miterwort
Mitella nuda L.
  naked miterwort
Mitella ovalis Greene
  coastal miterwort
Mitella pentandra Hook.
  fivestamen miterwort
Mitella stauropetala Piper
  smallflower miterwort
Mitella stauropetala var. stauropetala Piper
  smallflower miterwort
Mitella trifida Graham
  threeparted miterwort
Mitella trifida var. trifida Graham
  threeparted miterwort
Mitella trifida var. violacea (Rydb.) Rosendahl
  threeparted miterwort
Parnassia fimbriata Koenig
  Rocky Mountain parnassia
Parnassia fimbriata var. fimbriata Koenig
  fringed grass of Parnassus
Parnassia fimbriata var. hoodiana C.L. Hitchc.
  fringed grass of Parnassus
Parnassia kotzebuei Cham. ex Spreng.
  Kotzebue's grass of Parnassus
Parnassia palustris L.
  northern grass of Parnassus
Parnassia palustris var. tenuis Wahlenb.
  marsh grass of Parnassus
Saxifraga adscendens L.
  wedgeleaf saxifrage
Saxifraga adscendens ssp. oregonensis (Raf.) Bacig.
  small saxifrage
Saxifraga apetala Piper
  western swamp saxifrage
Saxifraga bronchialis L.
  yellowdot saxifrage
Saxifraga bronchialis ssp. austromontana (Wieg.) Piper
  matted saxifrage
Saxifraga bronchialis ssp. vespertina (Small) Piper
  yellowdot saxifrage
Saxifraga cernua L.
  nodding saxifrage
Saxifraga cespitosa L.
  tufted alpine saxifrage
Saxifraga cespitosa ssp. cespitosa L.
  tufted alpine saxifrage
Saxifraga cespitosa ssp. cespitosa var. emarginata (Small) Rosendahl
  tufted alpine saxifrage
Saxifraga cespitosa ssp. subgemmifera Engl. & Irmsch.
  tufted alpine saxifrage
Saxifraga ferruginea Graham
  rustyhair saxifrage
Saxifraga ferruginea var. ferruginea Graham
  rustyhair saxifrage
Saxifraga ferruginea var. vreelandii (Small) Engl. & Irmsch.
  Vreeland's saxifrage
Saxifraga idahoensis Piper
  Idaho saxifrage
Saxifraga integrifolia Hook.
  wholeleaf saxifrage
Saxifraga lyallii Engl.
  redstem saxifrage
Saxifraga lyallii ssp. lyallii Engl.
  Lyall's saxifrage
Saxifraga marshallii Greene
  Marshall's saxifrage
Saxifraga mertensiana Bong.
  wood saxifrage
Saxifraga nelsoniana D. Don
  heartleaf saxifrage
Saxifraga nelsoniana ssp. cascadensis (Calder & Savile) Hulten
  cascade saxifrage
Saxifraga nidifica Greene
  peak saxifrage
Saxifraga nidifica var. claytoniifolia (Canby ex Small) Elvander
  peak saxifrage
Saxifraga nidifica var. nidifica Greene
  peak saxifrage
Saxifraga nuttallii Small
  Nuttall's saxifrage
Saxifraga occidentalis S. Wats.
  Alberta saxifrage
Saxifraga odontoloma Piper
  brook saxifrage
Saxifraga oppositifolia L.
  purple mountain saxifrage
Saxifraga oregana T.J. Howell
  Oregon saxifrage
Saxifraga rivularis L.
  weak saxifrage
Saxifraga rufidula (Small) Macoun
  rustyhair saxifrage
Saxifraga stolonifera Meerb.
  creeping saxifrage
Saxifraga tischii Skelly
  Olympic saxifrage
Saxifraga tolmiei Torr. & Gray
  Tolmie's saxifrage
Saxifraga tricuspidata Rottb.
  three toothed saxifrage
Suksdorfia ranunculifolia (Hook.) Engl.
  buttercup suksdorfia
Suksdorfia violacea Gray
  violet suksdorfia
Sullivantia oregana S. Wats.
  Oregon coolwort
Tellima grandiflora (Pursh) Dougl. ex Lindl.
  bigflower tellima
Tiarella trifoliata L.
  threeleaf foamflower
Tiarella trifoliata var. laciniata (Hook.) Wheelock
  threeleaf foamflower
Tiarella trifoliata var. trifoliata L.
  threeleaf foamflower
Tiarella trifoliata var. unifoliata (Hook.) Kurtz
  oneleaf foamflower
Tolmiea menziesii (Pursh) Torr. & Gray
  youth on age

SCHEUCHZERIACEAE
Scheuchzeria palustris L.
  scheuchzeria
Scheuchzeria palustris ssp. americana (Fern.) Hulten
  American scheuchzeria

SCROPHULARIACEAE
Besseya rubra (Dougl. ex Hook.) Rydb.
  red besseya
Castilleja Mutis ex L. f.
  Indian paintbrush
Castilleja affinis Hook. & Arn.
  Indian paintbrush
Castilleja affinis ssp. litoralis (Pennell) Chuang & Heckard
Castilleja ambigua Hook. & Arn.
  ambiguous Indian paintbrush
Castilleja ambigua ssp. ambigua Hook. & Arn.
  ambiguous Indian paintbrush
Castilleja attenuata (Gray) Chuang & Heckard
  attenuate Indian paintbrush
Castilleja cervina Greenm.
  deer Indian paintbrush
Castilleja cryptantha Pennell & G.N. Jones
  obscure Indian paintbrush
Castilleja cusickii Greenm.
  Cusick's Indian paintbrush
Castilleja elmeri Fern.
  Wenatchee Indian paintbrush
Castilleja exserta (Heller) Chuang & Heckard
  exserted Indian paintbrush
Castilleja exserta ssp. exserta (Heller) Chuang & Heckard
  exserted Indian paintbrush
Castilleja hispida Benth.
  harsh Indian paintbrush
Castilleja hispida ssp. acuta Pennell
  acute Indian paintbrush
Castilleja hispida ssp. hispida Benth.
  harsh Indian paintbrush
Castilleja levisecta Greenm.
  golden Indian paintbrush
Castilleja lutescens (Greenm.) Rydb.
  yellow Indian paintbrush
Castilleja miniata Dougl. ex Hook.
  scarlet Indian paintbrush
Castilleja miniata ssp. dixonii (Fern.) Kartesz, comb. nov. ined.
Castilleja miniata var. miniata Dougl. ex Hook.
  green Indian paintbrush
Castilleja minor (Gray) Gray
  lesser Indian paintbrush
Castilleja minor ssp. minor (Gray) Gray
Castilleja parviflora Bong.
  mountain Indian paintbrush
Castilleja parviflora var. albida (Pennell) Ownbey
  smallflower Indian paintbrush
Castilleja parviflora var. olympica (G.N. Jones) Ownbey
  Olympic Indian paintbrush
Castilleja parviflora var. oreopola (Greenm.) Ownbey
  Henry Indian paintbrush
Castilleja rhexiifolia Rydb.
  splitleaf Indian paintbrush
Castilleja rupicola Piper ex Fern.
  cliff Indian paintbrush
Castilleja septentrionalis Lindl.
  Labrador Indian paintbrush
Castilleja suksdorfii Gray
  Suksdorf's Indian paintbrush
Castilleja tenuis (Heller) Chuang & Heckard
  Indian paintbrush
Castilleja thompsonii Pennell
  Thompson's Indian paintbrush
Collinsia grandiflora Lindl.
Collinsia parviflora Lindl.
  smallflower blue eyed Mary
Collinsia parviflora var. parviflora Lindl.
  smallflower blue eyed Mary
Collinsia rattanii Gray
  sticky blue eyed Mary
Collinsia rattanii ssp. glandulosa (T.J. Howell) Pennell
  sticky blue eyed Mary
Collinsia sparsiflora Fisch. & C.A. Mey.
  spinster's blue eyed Mary
Collinsia sparsiflora var. bruceae (M.E. Jones) Newsom
  spinster's blue eyed Mary
Cordylanthus capitatus Nutt. ex Benth.
  Yakima bird's beak
Cymbalaria muralis P.G. Gaertn., B. Mey. & Scherb.
  Kenilworth ivy
Digitalis purpurea L.
  purple foxglove
Digitalis purpurea var. purpurea L.
  purple foxglove
Euphrasia arctica var. disjuncta (Fern. & Wieg.) Cronq.
  = Euphrasia disjuncta
Euphrasia disjuncta Fern. & Wieg.
  polar eyebright
Euphrasia officinalis L.
  = Euphrasia stricta
Euphrasia stricta D. Wolff ex J.F. Lehm.
  drug eyebright
Gratiola ebracteata Benth. ex A. DC.
  bractless hedgehyssop
Gratiola neglecta Torr.
  clammy hedgehyssop
Limosella acaulis Sesse & Moc.
  Owyhee mudwort
Limosella aquatica L.
  water mudwort
Limosella australis R. Br.
  Welsh mudwort
Linaria canadensis (L.) Chaz.
  = Nuttallanthus canadensis
Linaria canadensis var. texana (Scheele) Pennell
  = Nuttallanthus texanus
Linaria dalmatica (L.) P. Mill.
  Dalmatian toadflax
Linaria dalmatica ssp. dalmatica (L.) P. Mill.
  Dalmatian toadflax
Linaria dalmatica ssp. macedonica (Griseb.) D.A. Sutton
  Dalmatian toadflax
Linaria texana Scheele
  = Nuttallanthus texanus
Linaria vulgaris P. Mill.
  butter and eggs
Lindernia dubia (L.) Pennell
  moistbank pimpernel
Lindernia dubia var. anagallidea (Michx.) Cooperrider
  yellowseed false pimpernel
Lindernia dubia var. dubia (L.) Pennell
  yellowseed false pimpernel
Melampyrum lineare Desr.
  narrowleaf cowwheat
Melampyrum lineare var. lineare Desr.
  American cowwheat
Mimetanthe pilosa (Benth.) Greene
  false monkeyflower
Mimulus alsinoides Dougl. ex Benth.
  wingstem monkeyflower
Mimulus breviflorus Piper
  shortflower monkeyflower
Mimulus breweri (Greene) Coville
  Brewer's monkeyflower
Mimulus clivicola Greenm.
  North Idaho monkeyflower
Mimulus cusickii (Greene) Rattan
  Cusick's monkeyflower
Mimulus dentatus Nutt. ex Benth.
  coastal monkeyflower
Mimulus floribundus Lindl.
  manyflowered monkeyflower
Mimulus guttatus DC.
  seep monkeyflower
Mimulus lewisii Pursh
  purple monkeyflower
Mimulus moschatus Dougl. ex Lindl.
  musk monkeyflower
Mimulus moschatus var. longiflorus Gray
  muskflower
Mimulus moschatus var. moschatus Dougl. ex Lindl.
  muskflower
Mimulus moschatus var. sessilifolius Gray
  muskflower
Mimulus nanus Hook. & Arn.
  dwarf purple monkeyflower
Mimulus nanus ssp. nanus Hook. & Arn.
  dwarf purple monkeyflower
Mimulus primuloides Benth.
  primrose monkeyflower
Mimulus primuloides var. primuloides Benth.
  primrose monkeyflower
Mimulus pulsiferae Gray
  candelabrum monkeyflower
Mimulus suksdorfii Gray
  Suksdorf's monkeyflower
Mimulus tilingii Regel
  Tiling's monkeyflower
Mimulus tilingii var. caespitosus (Greene) A.L. Grant
  subalpine monkeyflower
Mimulus washingtonensis Gandog.
  Washington monkeyflower
Misopates orontium (L.) Raf.
  linearleaf snapdragon
Nothochelone nemorosa (Dougl. ex Lindl.) Straw
  woodland beardtongue
Nuttallanthus canadensis (L.) D.A. Sutton
  Canada toadflax
Nuttallanthus texanus (Scheele) D.A. Sutton
  Texas toadflax
Orthocarpus barbatus Cotton
  Grand Coulee owlclover
Orthocarpus bracteosus Benth.
  rosy owlclover
Orthocarpus castillejoides var. castillejoides Benth.
  johnnynip
Orthocarpus imbricatus Torr. ex S. Wats.
  mountain owlclover
Orthocarpus luteus Nutt.
  yellow owlclover
Orthocarpus purpurascens var. purpurascens Benth.
  red owlclover
Orthocarpus tenuifolius (Pursh) Benth.
  thinleaved owlclover
Parentucellia viscosa (L.) Caruel
  yellow glandweed
Pedicularis bracteosa Benth.
  bracted lousewort
Pedicularis bracteosa var. atrosanguinea (Pennell & J.W. Thompson) Cronq.
  bracted lousewort
Pedicularis bracteosa var. bracteosa Benth.
  bracted lousewort
Pedicularis bracteosa var. canbyi (Gray) Cronq.
  Canby's lousewort
Pedicularis bracteosa var. flavida (Pennell) Cronq.
  towering lousewort
Pedicularis bracteosa var. latifolia (Pennell) Cronq.
  widepetal lousewort
Pedicularis bracteosa var. pachyrhiza (Pennell) Cronq.
  towering lousewort
Pedicularis bracteosa var. siifolia (Rydb.) Cronq.
  smoothflower lousewort
Pedicularis contorta Benth.
  coiled lousewort
Pedicularis contorta var. contorta Benth.
  coiled lousewort
Pedicularis groenlandica Retz.
  elephanthead lousewort
Pedicularis groenlandica ssp. surrecta (Benth.) Piper
  Greenland lousewort
Pedicularis ornithorhyncha Benth.
  ducksbill lousewort
Pedicularis racemosa Dougl. ex Benth.
  sickletop lousewort
Pedicularis racemosa ssp. alba Pennell
  sickletop lousewort
Pedicularis racemosa ssp. racemosa Dougl. ex Benth.
  sickletop lousewort
Pedicularis rainierensis Pennell & Warren
  Mt. Rainier lousewort
Penstemon acuminatus Dougl. ex Lindl.
  sharpleaf penstemon
Penstemon acuminatus var. acuminatus Dougl. ex Lindl.
  sharpleaf penstemon
Penstemon attenuatus Dougl. ex Lindl.
  sulphur penstemon
Penstemon attenuatus var. attenuatus Dougl. ex Lindl.
  sulphur penstemon
Penstemon barrettiae Gray
  Barrett's beardtongue
Penstemon cardwellii T.J. Howell
  Cardwell's beardtongue
Penstemon confertus Dougl. ex Lindl.
  yellow penstemon
Penstemon davidsonii Greene
  Davidson's penstemon
Penstemon davidsonii var. davidsonii Greene
  Davidson's penstemon
Penstemon davidsonii var. menziesii (Keck) Cronq.
  Menzies' penstemon
Penstemon deustus Dougl. ex Lindl.
  scabland penstemon
Penstemon deustus var. deustus Dougl. ex Lindl.
  hotrock beardtongue
Penstemon deustus var. variabilis (Suksdorf) Cronq.
  hotrock beardtongue
Penstemon diphyllus Rydb.
  twoleaf beardtongue
Penstemon ellipticus Coult. & Fisher
  rocky ledge penstemon
Penstemon eriantherus Pursh
  fuzzytongue penstemon
Penstemon eriantherus var. eriantherus Pursh
  fuzzytongue penstemon
Penstemon eriantherus var. whitedii (Piper) A. Nels.
  Whited's penstemon
Penstemon euglaucus English
  glaucous beardtongue
Penstemon fruticosus (Pursh) Greene
  bush penstemon
Penstemon fruticosus var. fruticosus (Pursh) Greene
  shrubby penstemon
Penstemon fruticosus var. scouleri (Lindl.) Cronq.
  littleleaf bush penstemon
Penstemon fruticosus var. serratus (Keck) Cronq.
  sawleaf bush penstemon
Penstemon gairdneri Hook.
  Gairdner's beardtongue
Penstemon gairdneri var. gairdneri Hook.
  Gairdner's beardtongue
Penstemon gairdneri var. oreganus Gray
  Gairdner's beardtongue
Penstemon glandulosus Dougl.
  stickystem penstemon
Penstemon glandulosus var. chelanensis (Keck) Cronq.
  stickystem penstemon
Penstemon glandulosus var. glandulosus Dougl.
  stickystem penstemon
Penstemon humilis Nutt. ex Gray
  low penstemon
Penstemon humilis ssp. humilis Nutt. ex Gray
  low beardtongue
Penstemon ovatus Dougl. ex Hook.
  eggleaf beardtongue
Penstemon pennellianus Keck
  Blue Mountain beardtongue
Penstemon procerus Dougl. ex Graham
  littleflower penstemon
Penstemon procerus var. procerus Dougl. ex Graham
  pincushion beardtongue
Penstemon procerus var. tolmiei (Hook.) Cronq.
  Tolmie's penstemon
Penstemon pruinosus Dougl. ex Lindl.
  Chilean beardtongue
Penstemon richardsonii Dougl. ex Lindl.
  cutleaf beardtongue
Penstemon richardsonii var. richardsonii Dougl. ex Lindl.
  Richardson's penstemon
Penstemon rupicola (Piper) T.J. Howell
  cliff beardtongue
Penstemon rydbergii A. Nels.
  Rydberg's penstemon
Penstemon rydbergii var. rydbergii A. Nels.
  swollen penstemon
Penstemon serrulatus Menzies ex Sm.
  serrulate penstemon
Penstemon speciosus Dougl. ex Lindl.
  royal penstemon
Penstemon subserratus Pennell
  finetooth beardtongue
Penstemon triphyllus Dougl. ex Lindl.
  Riggin's penstemon
Penstemon venustus Dougl. ex Lindl.
  Venus penstemon
Penstemon washingtonensis Keck
  Washington beardtongue
Penstemon wilcoxii Rydb.
  Wilcox's penstemon
Rhinanthus minor L.
  little yellowrattle
Rhinanthus minor ssp. groenlandicus (Ostenf.) L. Neum.
  arctic rattlebox
Rhinanthus minor ssp. minor L.
  cockscomb rhinanthus
Scrophularia lanceolata Pursh
  lanceleaf figwort
Scrophularia oregana Pennell
  Oregon figwort
Synthyris missurica (Raf.) Pennell
  tailed kittenstails
Synthyris missurica ssp. missurica (Raf.) Pennell
  tailed kittenstails
Synthyris missurica ssp. stellata (Pennell) Kartesz & Gandhi
  western mountain kittenstails
Synthyris pinnatifida S. Wats.
  featherleaf kittenstails
Synthyris pinnatifida var. lanuginosa (Piper) Cronq.
  featherleaf kittenstails
Synthyris reniformis (Dougl. ex Benth.) Benth.
  snowqueen
Synthyris reniformis var. reniformis (Dougl. ex Benth.) Benth.
  snowqueen
Synthyris schizantha Piper
  fringepetal kittenstails
Tonella floribunda Gray
  manyflower tonella
Tonella tenella (Benth.) Heller
  lesser baby innocence
Triphysaria eriantha (Benth.) Chuang & Heckard
  triphysaria
Triphysaria eriantha ssp. eriantha (Benth.) Chuang & Heckard
  triphysaria
Triphysaria pusilla (Benth.) Chuang & Heckard
  triphysaria
Verbascum blattaria L.
  moth mullein
Verbascum thapsus L.
  common mullein
Veronica americana Schwein. ex Benth.
  American speedwell
Veronica anagallis-aquatica L.
  water speedwell
Veronica arvensis L.
  corn speedwell
Veronica biloba L.
  twolobe speedwell
Veronica chamaedrys L.
  germander speedwell
Veronica cusickii Gray
  Cusick's speedwell
Veronica filiformis Sm.
  threadstalk speedwell
Veronica hederifolia L.
  ivyleaf speedwell
Veronica longifolia L.
  longleaf speedwell
Veronica officinalis L.
  common gypsyweed
Veronica officinalis var. officinalis L.
  common gypsyweed
Veronica officinalis var. tournefortii (Vill.) Reichenb.
  common gypsyweed
Veronica peregrina L.
  neckweed
Veronica peregrina ssp. peregrina L.
  neckweed
Veronica peregrina ssp. xalapensis (Kunth) Pennell
  hairy purslane speedwell
Veronica persica Poir.
  birdeye speedwell
Veronica scutellata L.
  skullcap speedwell
Veronica serpyllifolia L.
  thymeleaf speedwell
Veronica serpyllifolia ssp. humifusa (Dickson) Syme
  brightblue speedwell
Veronica serpyllifolia ssp. serpyllifolia L.
  thymeleaf speedwell
Veronica wormskjoldii Roemer & J.A. Schultes
  American alpine speedwell

SELAGINELLACEAE
Selaginella densa Rydb.
  lesser spikemoss
Selaginella densa var. scopulorum (Maxon) R. Tryon
  Rocky Mountain spikemoss
Selaginella douglasii (Hook. & Grev.) Spring
  Douglas' spikemoss
Selaginella oregana D.C. Eat.
  Oregon spikemoss
Selaginella wallacei Hieron.
  Wallace's spikemoss

SIMAROUBACEAE
Ailanthus altissima (P. Mill.) Swingle
  tree of heaven

SOLANACEAE
Atropa bella-donna L.
  belladonna
Datura stramonium L.
  jimsonweed
Datura tatula L.
  = Datura stramonium
Hyoscyamus niger L.
  black henbane
Lycium barbarum L.
  matrimonyvine
Nicotiana acuminata (Graham) Hook.
  manyflower tobacco
Nicotiana acuminata var. multiflora (Phil.) Reiche
  manyflower tobacco
Nicotiana attenuata Torr. ex S. Wats.
  coyote tobacco
Physalis hispida (Waterfall) Cronq.
  prairie groundcherry
Physalis longifolia Nutt.
  longleaf groundcherry
Physalis longifolia var. subglabrata (Mackenzie & Bush) Cronq.
  longleaf groundcherry
Physalis philadelphica Lam.
  Mexican groundcherry
Physalis pruinosa L.
  strawberry tomato
Solanum americanum P. Mill.
  American black nightshade
Solanum dulcamara L.
  climbing nightshade
Solanum physalifolium Rusby
  hoe nightshade
Solanum ptychanthum Dunal
  nightshade
Solanum rostratum Dunal
  buffalobur nightshade
Solanum triflorum Nutt.
  cutleaf nightshade
Solanum tuberosum L.
  Irish potato

TAXACEAE
Taxus brevifolia Nutt.
  Pacific yew

THELYPTERIDACEAE
Phegopteris connectilis (Michx.) Watt
  long beechfern
Thelypteris nevadensis (Baker) Clute ex Morton
  Sierran marsh fern
Thelypteris quelpaertensis (Christ) Ching
  queensveil maiden fern

TYPHACEAE
Typha latifolia L.
  broadleaf cattail

ULMACEAE
Celtis laevigata Willd.
  sugarberry
Celtis laevigata var. reticulata (Torr.) L. Benson
  netleaf hackberry

UMBELLIFERAE
Angelica arguta Nutt.
  Lyall's angelica
Angelica canbyi Coult. & Rose
  Canby's angelica
Angelica genuflexa Nutt.
  kneeling angelica
Angelica hendersonii Coult. & Rose
  beach angelica
Angelica lucida L.
  wild celery
Angelica tomentosa S. Wats.
  woolly angelica
Anthriscus caucalis Bieb.
  burr chervil
Apium prostratum Labill.
  prostrate marshwort
Berula erecta (Huds.) Coville
  cutleaf waterparsnip
Carum carvi L.
  caraway
Cicuta bulbifera L.
  bulblet bearing water hemlock
Cicuta douglasii (DC.) Coult. & Rose
  western water hemlock
Conioselinum gmelinii (Cham. & Schlecht.) Steud.
  Pacific hemlockparsley
Conium maculatum L.
  poison hemlock
Cymopterus terebinthinus (Hook.) Torr. & Gray
  = Pteryxia terebinthina var. terebinthina
Daucus carota L.
  Queen Anne's lace
Daucus pusillus Michx.
  American wild carrot
Eryngium articulatum Hook.
  beethistle
Eryngium petiolatum Hook.
  rushleaf eryngo
Foeniculum vulgare P. Mill.
  sweet fennel
Glehnia littoralis F. Schmidt ex Miq.
  American silvertop
Heracleum lanatum Michx.
  = Heracleum maximum
Heracleum maximum Bartr.
  common cowparsnip
Heracleum sphondylium L.
  eltrot (??)
Hydrocotyle ranunculoides L. f.
  floating marshpennywort
Leptotaenia dissecta Nutt.
  = Lomatium dissectum var. dissectum
Leptotaenia multifida Nutt.
  = Lomatium dissectum var. multifidum
Ligusticum apiifolium (Nutt. ex Torr. & Gray) Gray
  celeryleaf licoriceroot
Ligusticum canbyi Coult. & Rose
  Canby's licoriceroot
Ligusticum grayi Coult. & Rose
  Gray's licoriceroot
Lilaeopsis occidentalis Coult. & Rose
  western grasswort
Lomatium ambiguum (Nutt.) Coult. & Rose
  Wyeth biscuitroot
Lomatium bicolor (S. Wats.) Coult. & Rose
  Wasatch desertparsley
Lomatium bicolor var. leptocarpum (Torr. & Gray) Schlessman
  Wasatch desertparsley
Lomatium brandegei (Coult. & Rose) J.F. Macbr.
  Brandegee's desertparsley
Lomatium canbyi (Coult. & Rose) Coult. & Rose
  Canby's biscuitroot
Lomatium columbianum Mathias & Constance
  purple leptotaenia
Lomatium cous (S. Wats.) Coult. & Rose
  cous biscuitroot
Lomatium cuspidatum Mathias & Constance
  Wenatchee desertparsley
Lomatium dissectum (Nutt.) Mathias & Constance
  lomatiumroot
Lomatium dissectum var. dissectum (Nutt.) Mathias & Constance
  lomatiumroot
Lomatium dissectum var. multifidum (Nutt.) Mathias & Constance
  lomatiumroot
Lomatium donnellii (Coult. & Rose) Coult. & Rose
  Donnell's biscuitroot
Lomatium farinosum (Hook.) Coult. & Rose
  northern biscuitroot
Lomatium farinosum var. farinosum (Hook.) Coult. & Rose
  northern biscuitroot
Lomatium farinosum var. hambleniae (Mathias & Constance) Schlessman
  Hamblen's biscuitroot
Lomatium geyeri (S. Wats.) Coult. & Rose
  Geyer's biscuitroot
Lomatium gormanii (T.J. Howell) Coult. & Rose
  Gorman's biscuitroot
Lomatium grayi (Coult. & Rose) Coult. & Rose
  Gray's biscuitroot
Lomatium grayi var. grayi (Coult. & Rose) Coult. & Rose
  Gray's biscuitroot
Lomatium hallii (S. Wats.) Coult. & Rose
  Hall's biscuitroot
Lomatium laevigatum (Nutt.) Coult. & Rose
  Slickrock biscuitroot
Lomatium macrocarpum (Nutt. ex Torr. & Gray) Coult. & Rose
  bigseed biscuitroot
Lomatium martindalei (Coult. & Rose) Coult. & Rose
  cascade desertparsley
Lomatium nudicaule (Pursh) Coult. & Rose
  barestem biscuitroot
Lomatium orientale Coult. & Rose
  Northern Idaho biscuitroot
Lomatium piperi Coult. & Rose
  Indian biscuitroot
Lomatium quintuplex Schlessman & Constance
  Umtanum desertparsley
Lomatium rollinsii Mathias & Constance
  Rollins' biscuitroot
Lomatium salmoniflorum (Coult. & Rose) Mathias & Constance
  salmonflower biscuitroot
Lomatium serpentinum (M.E. Jones) Mathias
  sweetscented biscuitroot
Lomatium simplex (Nutt.) J.F. Macbr.
  narrowleaf lomatium
Lomatium simplex var. leptophyllum (Hook.) Mathias
  narrowleaf lomatium
Lomatium simplex var. simplex (Nutt.) J.F. Macbr.
  Great Basin desertparsley
Lomatium suksdorfii (S. Wats.) Coult. & Rose
  Suksdorf's desertparsley
Lomatium thompsonii (Mathias ) Cronq.
  Thompson's desertparsley
Lomatium triternatum (Pursh) Coult. & Rose
  nineleaf biscuitroot
Lomatium triternatum var. anomalum (M.E. Jones ex Coult. & Rose) Mathias
  broadnineleaf biscuitroot
Lomatium triternatum var. brevifolium (Coult. & Rose) Mathias
  nineleaf biscuitroot
Lomatium triternatum var. macrocarpum (Coult. & Rose) Mathias
  nineleaf biscuitroot
Lomatium triternatum var. triternatum (Pursh) Coult. & Rose
  nineleaf biscuitroot
Lomatium tuberosum Hoover
  Hoover's desertparsley
Lomatium utriculatum (Nutt. ex Torr. & Gray) Coult. & Rose
  common lomatium
Lomatium watsonii (Coult. & Rose) Coult. & Rose
  Watson's desertparsley
Oenanthe sarmentosa K. Presl ex DC.
  water parsely
Orogenia linearifolia S. Wats.
  Great Basin Indian potato
Osmorhiza berteroi DC.
  sweetcicely
Osmorhiza chilensis Hook. & Arn.
  = Osmorhiza berteroi
Osmorhiza depauperata Phil.
  bluntseed sweetroot
Osmorhiza occidentalis (Nutt. ex Torr. & Gray) Torr.
  western sweetroot
Osmorhiza purpurea (Coult. & Rose) Suksdorf
  purple sweetroot
Pastinaca sativa L.
  wild parsnip
Perideridia gairdneri (Hook. & Arn.) Mathias
  yampa
Perideridia gairdneri ssp. borealis Chuang & Constance
  common yampah
Perideridia gairdneri ssp. gairdneri (Hook. & Arn.) Mathias
  Gairdner's yampah
Perideridia oregana (S. Wats.) Mathias
  squaw potato
Pimpinella saxifraga L.
  solidstem burnet saxifrage
Pimpinella saxifraga ssp. nigra (P. Mill.) Gaudin
  solidstem burnet saxifrage
Pteryxia terebinthina (Hook.) Coult. & Rose
  smoothshore springparsley
Pteryxia terebinthina var. foeniculacea (Nutt. ex Torr. & Gray) Mathias
  lesser lomatiumroot
Pteryxia terebinthina var. terebinthina (Hook.) Coult. & Rose
  lesser lomatiumroot
Sanicula arctopoides Hook. & Arn.
  footsteps of spring
Sanicula bipinnatifida Dougl. ex Hook.
  purple sanicle
Sanicula crassicaulis Poepp. ex DC.
  Pacific blacksnakeroot
Sanicula crassicaulis var. crassicaulis Poepp. ex DC.
  Pacific blacksnakeroot
Sanicula crassicaulis var. tripartita (Suksdorf) H. Wolff
  Pacific blacksnakeroot
Sanicula graveolens Poepp. ex DC.
  northern sanicle
Sanicula marilandica L.
  Maryland sanicle
Scandix pecten-veneris L.
  shepherdsneedle
Sium suave Walt.
  hemlock waterparsnip
Tauschia hooveri Mathias & Constance
  Hoover's umbrellawort
Tauschia stricklandii (Coult. & Rose) Mathias & Constance
  Strickland's umbrellawort
Yabea microcarpa (Hook. & Arn.) K.-Pol.
  falsecarrot
Zizia aptera (Gray) Fern.
  meadow zizia

URTICACEAE
Parietaria pensylvanica Muhl. ex Willd.
  Pennsylvania pellitory
Parietaria pensylvanica var. 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 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
Plectritis congesta (Lindl.) DC.
  shortspur seablush
Plectritis congesta ssp. brachystemon (Fisch. & C.A. Mey.) Morey
  shortspur seablush
Plectritis congesta ssp. congesta (Lindl.) DC.
  shortspur seablush
Plectritis macrocera Torr. & Gray
  longhorn plectritis
Plectritis macrocera ssp. grayi (Suksdorf) Morey
  Gray's seablush
Plectritis macrocera ssp. macrocera Torr. & Gray
  white seablush
Valeriana acutiloba Rydb.
  sharpleaf valerian
Valeriana acutiloba var. pubicarpa (Rydb.) Cronq.
  hairyfruit valerian
Valeriana columbiana Piper
  Wenatchee valerian
Valeriana dioica L.
  marsh valerian
Valeriana dioica var. sylvatica S. Wats.
  woods valerian
Valeriana edulis Nutt. ex Torr. & Gray
  edible valerian
Valeriana edulis var. edulis Nutt. ex Torr. & Gray
  tobacco root
Valeriana officinalis L.
  garden valerian
Valeriana scouleri Rydb.
  Scouler's valerian
Valeriana sitchensis Bong.
  Sitka valerian
Valerianella carinata Loisel.
  European cornsalad
Valerianella locusta (L.) Lat.
  Lewiston cornsalad

VERBENACEAE
Verbena X perriana Moldenke
  verbena
Verbena bracteata Lag. & Rodr.
  bigbract verbena
Verbena hastata L.
  swamp verbena
Verbena hastata var. scabra Moldenke
  swamp verbena
Verbena stricta Vent.
  hoary verbena

VIOLACEAE
Viola adunca Sm.
  hookedspur violet
Viola adunca var. adunca Sm.
  hookedspur violet
Viola affinis Le Conte
  sand violet
Viola arvensis Murr.
  field pansy
Viola bakeri Greene
  Baker's violet
Viola canadensis L.
  Canadian white violet
Viola canadensis var. rugulosa (Greene) C.L. Hitchc.
  creepingroot violet
Viola epipsila Ledeb.
  dwarf marsh violet
Viola epipsila ssp. repens Becker
  dwarf marsh violet
Viola flettii Piper
  Olympic violet
Viola glabella Nutt.
  pioneer violet
Viola howellii Gray
  Howell's violet
Viola lanceolata L.
  bog white violet
Viola lanceolata ssp. lanceolata L.
  bog white violet
Viola langsdorfii Fisch. ex Gingins
  Aleutian violet
Viola macloskeyi Lloyd
  small white violet
Viola macloskeyi ssp. macloskeyi Lloyd
  Macloskey's violet
Viola macloskeyi ssp. pallens (Banks ex DC.) M.S. Baker
  smooth white violet
Viola nephrophylla var. nephrophylla Greene
  northern bog violet
Viola orbiculata Geyer ex Holz.
  darkwoods violet
Viola palustris L.
  marsh violet
Viola palustris var. palustris L.
  marsh violet
Viola praemorsa Dougl. ex Lindl.
  canary violet
Viola praemorsa ssp. linguifolia (Nutt.) M.S. Baker & J.C. Clausen ex M.E. Peck
  upland yellow violet
Viola praemorsa ssp. praemorsa Dougl. ex Lindl.
  canary violet
Viola purpurea Kellogg
  goosefoot violet
Viola purpurea ssp. venosa (S. Wats.) M.S. Baker & J.C. Clausen
  goosefoot yellow violet
Viola sempervirens Greene
  evergreen violet
Viola sheltonii Torr.
  Shelton's violet
Viola sororia Willd.
  common blue violet
Viola trinervata (T.J. Howell) T.J. Howell ex Gray
  Rainier violet
Viola vallicola A. Nels.
  valley violet
Viola vallicola var. major (Hook.) Fabijan
  valley violet
Viola vallicola var. vallicola A. Nels.
  sagebrush violet

VISCACEAE
Arceuthobium abietinum Engelm. ex Munz
  fir dwarf mistletoe
Arceuthobium americanum Nutt. ex Engelm.
  American dwarf mistletoe
Arceuthobium campylopodum Engelm.
  western dwarf mistletoe
Arceuthobium douglasii Engelm.
  Douglas fir dwarf mistletoe
Arceuthobium laricis (Piper) St. John
  larch dwarf mistletoe
Arceuthobium tsugense (Rosendahl) G.N. Jones
  hemlock dwarf mistletoe

VITACEAE
Vitis vinifera L.
  domestic grape

ZANNICHELLIACEAE
Zannichellia palustris L.
  horned pondweed

ZOSTERACEAE
Phyllospadix scouleri Hook.
  Scouler's surfgrass
Phyllospadix serrulatus Rupr. ex Aschers.
  toothed surfgrass
Phyllospadix torreyi S. Wats.
  Torrey's surfgrass
Zostera japonica Aschers. & Graebn.
  dwarf eelgrass
Zostera marina L.
  seawrack
Zostera marina var. latifolia Morong
  seawrack

ZYGOPHYLLACEAE
Peganum harmala L.
  Syrian rue
Tribulus terrestris L.
  puncturevine
Zygophyllum fabago L.
  Syrian beancaper