Heu'chera america'na, Alum Root. -- The rhizome, U.S.P. 1820-1870; United States. Plant viscid, pubescent, .6-1.3 M. (2-4 degrees) high; leaves 5-7.5 Cm. (2-3') wide, crenate; flowers purplish-white; root 15 Cm. (6') long, 12 Mm. (1/2') thick, several-headed, many thin radicals, brownish-purple; bark thin, inodorous, astringent, bitter; contains tannin 18-20 p.c., starch 5-16 p.c. Astringent, tonic; diarrhea, menorrhagia, aphthae, ulcers, hemorrhoids. Dose, gr. 15-30 (1-2 Gm.), in decoction.