As'arum canaden'se, Asarum, Canada Snake-root, Wild Ginger, N.F. The dried rhizome and roots with not more than 5 p.c. of foreign organic matter, North America. Small plant with dividing stem; leaves 2, reniform; flowers brownish-purple, woolly; fruit capsule, 6-celled. Rhizome 5-17 Cm. (207') long, 2-4 Mm. (1/12-1/6') thick, 2-edged (young), quadrangular (old), finely striate, nodes with irregular scars, internodes with annular scars, purplish-brown, fracture short, whitish, few starchy or resinous roots; odor ginger-like or recalling serpentaria, non-irritating upon heating; taste pungent, bitter. Powder, brownish -- starch grains, tracheae, epidermal tissue, parenchyma and numerous oil cells; contains volatile oil 1.5-3.5 p.c., resin, asarin. Stimulant, carminative, tonic, diaphoretic, diuretic; whooping cough, colic, febrile affections. Dose, gr. 30 (2 Gm.); 1. Syrupus Asari Compositus, 6.2 p.c., + fldext. Ipecac 3/10 p.c., potassium carbonate 1/4 p.c., + dose, 3ss-1 (2-4 cc.). Infusion. Tincture.