22 WILD MEDICINAL PLANTS OF THE UNITED STATES. 



Clematis virginiana L. Crowfoot family (Ranunculaceae). 



Virgin's-bower; clematis. 



Shrubby, perennial vine; native; found along river banks in hedges and thick- 

 ets from Canada to Georgia and Kansas. 

 Parts Msed.— Leaves and flowers (nonofficial). 

 Clotbur, spiny. See Xanihium spinosum. 

 Clotweed, thorny. See Xanthium spinosum. 

 Clover, bitter. See Sabbatia angularis. 

 Clover, meadow-. See Trifolium pratense. 

 Clover, purple. See Trifolium pratense. 

 Clover, red. See Trifolium pratense. 

 Clover, yellow sweet. See Melilotus officinalis. ' 

 Club-moss. See Lycopodium clavatum. 



Cnicus benedictus L. Aster family (Asteraceae). 



Syiionjirns. — Cardmis benedictus Auct. ; Centaurea benedicta L. 

 Blessed thistle; holy thistle; bitter thistle; spotted thistle; St. Benedict' s-thistle. 

 Annual plant, 1 to 2 feet high; in waste places, Southern States, and in Califor- 

 nia and Utah; introduced from Europe. 

 Part used. — Herb (nonofficial). 

 Cocash. See Aster puniceus. 

 Cocash-weed. See Senecio aureus. 

 Cockle-but*^on. See Arctium lappa. 

 Cocowort. See Bursa bursa-pastoris. 

 Cohosh, black. See Cimicifuga racemosa. 

 Cohosh, blue. See Caulopliyllum thalictroides. 

 Cohosh, red. See Actaea rubra. 

 Cohosh, white. See Actaea alba. 



Colic- root. See Aletris farinosa, Dioscorea villosa, Lacinaria spicata, and L. squarrosa. 

 CoUinsonia canadensis L. • Mint family (Menthaceae). 



Stoneroot; richweed; knobroot; horse-balm. 

 Native, perennial herb, about 2 feet high, occurring in rich, moist woods from 



Maine to Wisconsin, south to Florida and Kansas. 

 Parts used.— B^oot and leaves (nonofficial). 

 Colt's-foot. See Tussilago farfara. 

 Colt's-tail. See Erigeron canadensis. 

 Columbine, European. See Aquilegia vidgaris. 

 Columbine, garden-. See Aquilegia vulgaris. 

 Columbine, wild. See under Aquilegia vidgaris. 

 Columbo, American. See Frasera carolinensis. 

 Comfrey. See Symphytum officinale. 

 Compass-plant. See Silphium laciniatum. 

 Comptonia asplenifolia Gaertn. Same as Comptonia peregrina. 



Comptonia peregrina (L.) Coulter. Bayberry family (Myricaceae). 



Synonyms. — Comptonia asplenifolia Gaertn.; My ricci asplenifolia L. 

 Sweet fern; spleenwortbush; meadow-fern. 

 Shrubby plant, about 2j feet high, native; in thin sandy or stony woods and on 



hillsides, Canada to North Carolina, Indiana, and Michigan. 

 Parts used. — Leaves and tops (nonofficial). 



Coneflower, pale-purple. See Brauneria angudifoHu. 



