Convalla'ria maja'lis, Lily-of-the-Valley, Convallariae Radix, Convallaria Root, Lily-of-the-Valley Root, N.F. -- The dried rhizome and roots with not more than 5 p.c. of leaves or other foreign organic matter, yielding not more than 6 p.c. of acid-insoluble ash; United States; cultivated in gardens. Stemless perennial; leaves 2-3, radical, smooth, elliptical; flowers campanulate, white, 1-sided raceme. Rhizome, variable length, 1-3 Mm. (1/25-1/8') thick, brownish, few circular stem-scars, 3-5 thin, tortuous, branching roots on lower portions of nodes; fracture short, fibrous, internally whitish; odor faint; taste sweetish, bitter, acrid. Powder, brown -- cakes on standing, few starch grains and calcium oxalate raphides, endodermal cells with porous walls, tracheae; solvents; diluted alcohol, boiling water partially; contains convallamarin, convallarin, resin. Heart tonic, diuretic, emetic, purgative, sternutatory, poisonous, similar to digitalis, but non-cumulative; heart greatly slowed; arrhythmia, "cardiac hurry", dropsy. Dose, gr. 2-10 (.13-.6 Gm.;)1. Fluidextractum Convallariae Radicis (75 p.c. alcohol), dose, mij-10 (.13-.6 cc.). Extract or convallamarin, gr. 1/2-2 (.03-.13 Gm.); Infusion, 25 p.c. , 3ss-1 (15-30 cc.). Poisoning: Symptoms and treatment similar to digitalis.