Marru'bium vulga're, (White, Common) Horehound. -- The dried leaves and flowering toops, U.S.P. 1820-1900; Europe, C. Asia, N. America, cultivated in waste places, gardens, etc. Perennial herb .3-.6 M. (1-2 degrees) high, with short rootstock; stems numerous, annual, branched below, quadrangular, tomentose, woolly; leaves 1.5-5 Cm. (3/5-2') long, opposite, petiolate, roundish-ovate, obtuse, coarsely crenate, strongly rugose-veined, white-hairy; flowers whitish, in dense, axillary whorls, calyx 10-toothed, divisions slightly unequal, erect-spreading, pungent; corolla small, bilabiate, 4 included stamens; fruit of 4 ovoid, obtuse, nearly smooth nutlets, 1.5 Mm. (1/16') long; odor distinct, agreeable; taste aromatic, bitter; solvents: diluted alcohol, boiling water; contains volatile oil, marrubiin (bitter amaroid), CHO, .02-4 p.c., resin, tannin, gum, albumin, salts.  Stimulant, tonic, bitter stomachic, expectorant, resolvent, anthelmintic (large doses -- diuretic, diaphoretic, laxative); dyspepsia, bronchitis, chronic hepatitis, jaundice, amenorrhea, phthisis, cachexia, catarrh, chronic rheumatism, intermittents.  Dose, 3ss-1(2-4 Gm.); extract, gr. 5-10 (.3-.6 Gm.); fluidextract, 3ss-1 (2-4 cc.); infusion (sweetened and flavored to liking), 5 p.c. 3j-2 (30-60 cc.); juice (Succus Marrubii), 3j-2 (4-8 cc.), in honey or milk; owing to bitterness, the lozenge (cough drop) is the most popular form for administration.