MATERIA MEDICA Factsheet: 
Herbs best used as a STRONG DECOCTION

STRONG  DECOCTION
Combine 32 parts of water with one part of herb (by weight), bring slowly
to a boil, continue for ten minutes, cool until warm, and strain.  Pour
additional water through the herb to return the volume to 32. 
 
A WEAK DECOCTION is the same, but using half as much herb in the same
volume of water.

Abies (Tsuga Canadensis, Hemlock Spruce) BARK. Weak Decoction.
Alnus serrulata (Tag Alder) BARK. Strong Decoction (Internal),
   Weak Decoction, (External).
Artostaphylos uva-ursi (Bearberry, Uva  Ursi) LEAVES
Betula (Birch) BARK
Chilopsis linearis (Desert Willow) BARK and TWIGS
Cichorium (Chicory) ROOT
Cinnamonum (Cinnamon) BARK
Cola nitida (Kola Nut) SEED
Condalia (Lotebush) Root and Bark
Encelia farinosa (Incienso, Brittlebush) LEAVES and STEMS
Eryngium  (Rattlesnake Master, Button   Snakeroot) ROOT.  
    Weak Decoction
Eupatorium purpureum (Gravel Root) ROOT.
Euphrasia (Eyebright) HERB
Glycyrrhiza lepidota (American Licorice) ROOT
Hamamelis (Witch Hazel) BARK, topically
Hydrangea (Seven Barks) ROOT
Jatropha cineria (Sangre de Drago) ROOT
Juglans cineria (Butternut Bark) BARK, Weak Decoction
Larrea (Chaparral) HERB, topically
Liatris (Button Snakeroot, Cachana) ROOT
Ligustrum (Privet) BARK and LEAVES
Oxydendron (Sourwood) LEAVES
Polygonatum (Solomon's Seal) ROOT
Polypodium glycyrrhiza (Licorice Fern) ROOT
Populus tremulioides (Aspen) BARK
Prinos (Ilex verticillatus, Black Alder) BARK and BERRIES
Prunus (Wild Cherry) BARK
Rubus villosus  (Blackberry) ROOT BARK
Rumex hymenosepalus (Canaigre) ROOT, external, mouthwash
Salix (Willow) BARK
Sassafras (Sassafras) BARK of ROOT
Senna (Cassia angustifolia)  LEAVES
Smilax (Sarsaparilla) ROOT
Spigelia (Pink Root) ROOT
Trifolium pratense (Red Clover) FLOWERING TOPS
Viburnum opulus (Cramp Bark) BARK
Viburnum prunifolium (Black Haw) BARK