70 WILD MEDICINAL PLANTS OF THE UNITED STATES. 



Thimbles. See Digitalis purpurea. 



Thiinbleweed. See Rudbeckia laciniata. 



Thistle, bitter. See Cnicus benedictus. 



Thistle, blessed. See Cnicus benedictus. 



Thistle, Canada. See Carduus arvensis. 



Thistle, creeping. See Carduus arvensis. 



Thistle, cursed. See Carduus arvensis. 



Thistle, holy. See Cnicus benedictus. 



Thistle, St. Benedict's-. See Cnicus benedictus. 



Thistle, spotted. See Cnicus benedictus. 



Thorn-apple. See Datura stramonium. 



Thoroughwort. See Eupatorium perfoliatum. 



Thousandleaf. See Achillea millefolium. 



Throwwort. See Leonurus cardiaca. 



Thuja occidentalis L. Pine family (Pinaceae). 



Arbor- vitae; white cedar; yellow cedar. 



Indigenous, evergreen tree, 20 to 50 feet in height; in wet soil and along banks 

 of streams, Canada to North Carolina, Illinois, and Minnesota. Especially 

 abundant in Canada and the Northern States. 



Parts used. — Branchlets and leaves (nonofficial). 

 Tiarella cordifolia L. Saxifrage family (Saxifrag-aceae). 



Coolwort; false miterwort; foamflower; gemfruit. 



Slender, indigenous perennial, 6 to 12 inches high, found in rich, moist woods, 

 Nova Scotia to Minnesota, south, especially along the mountains, to Georgia 

 and Indiana. 



Part used. — Herb (nonofficial). 

 Tickweed. See Hedeoma pulegioides. 

 Tilia americana L. Linden family (Tiliaceae). 



Synonym.— Tilia glabra Vent. 



Basswood; American linden; white wood. 



Large, indigenous forest tree, 60 to 125 feet in height; in rich woods, especially 

 along the mountains, from Canada to Georgia, west to Texas and Nebraska. 



Part used. — Inflorescence of this and of other species of Tilia (nonofficial). 

 Tilia glabra Vent. Same as Tilia americana. 

 Tinker' s-weed. See Triosteum perfoliatum. 

 Tobacco, Indian. See Lobelia inflata. 



Toothache-tree. See Fagara clara-herculis and Xanthoxyhfin americanum. 

 Touch-me-not, pale. See Impatiens aurea. 

 Touch-me-not, spotted. See Impatiens biflora. 

 Toywort. See Bursa bursa-pastoris. 

 Tree-primrose. See Oenothera biennis. 

 Trefoil, marsh-. See Menyanthes trifoliata. 

 Trefoil, shrubby. See Ptelea trifoliata. 

 Trefoil, sour. See Oxalis acetosella. 

 Trifolium pratense L. Pea family (Fabaceae). 



Bed clover; meadow-clover; purple clover. 



Perennial herb, 6 inches to 2 feet high; common in fields and meadows through- 

 out the eastern United States; naturalized from Europe, and widely cultivated. 



Part used. — Blossoms (nonofficial). 



