Tanace'tum vulga're, Tanacetum, Tansy. -- The leaves and tops, U.S.P. 1820-1890; Europe, Asia. Perennial herb, .6-1 M. (2-3 degrees) high; stem obscurely hexagonal, striated, often reddish; root fibrous, many-headed; flowers yellowish discoid, dense, terminal corymbs; fruit achene, small, oblong, 5-6 ribs, crowned with pappus. Leaves, 15 Cm. (6') long, bipinnatifid, segments obtuse, oblong, serrate, glandular, receptacle convex, naked, florets tubular; odor strong, aromatic; taste pungent, bitter; contains volatile oil .25 p.c., tanacetin, fat, resin, tannin, mucilage; solvents: alcohol, water. Stimulant, tonic emmenagogue, anthelmintic, diuretic, narcotic; large doses cause vomiting, convulsions, coma, mydriasis, feeble respiration and pulse, death from paralytic asphyxia. Used in intermittents, hysteria, amenorrhea, colic, abortifacient; locally for bruises, sprains, rheumatism, ulcers. Dose, gr. 15-60 (1-4 Gm.); fluidextract, mxv-60 (1-4 cc.); infusion, 5 p.c., 3j-2 (30-60 cc.); oil, mj-5 (.06-.3 cc.). T. vulgare var. Cris'pum, Double Tansy. -- Leaves twice pinnatifid, curled. T. balsam'ita (Pyrethrum Tanacetum), S. Europe; odor strong, taste bitter. Both often cultivated and used similar to T. vulgare.