Gera'anium macula'tum, Geranium, Cranesbill, N.F. -- Geraniaceae. The dried rhizome with not more than 2 p.c. of foreign organic matter; N. America, rich woods, thickets. Perennial, hairy herb, .3-.6 M. (1-2 degrees) high; leaves palmately 5-7-lobed, each lobe incised at apex, cuneate, hairy, pale green with paler spots; flowers large, purplish, umbels; petals 5, entire; fruit long-beaked. Rhizome, cylindraceous, 2.5-10 Cm. (1-4') long, 3-15 Mm. (1/8-3/5') thick, somewhat branched, bent, flattened, strongly tuberculated, root-scars, wrinkled, dark purple-brown, internally light purple-brown; fracture short, non-fibrous, bark thin, cambium distinct, irregular, wood-wedges, large central pith, few fibro-vascular bundles; odorless; taste strongly astringent. Powder, purplish-brown -- cortical and pith parenchyma, starch grains, calcium oxalate rosettes, cork cells with brownish amorphous content, fragments bluish-black with ammonio-ferric alum T.S.; tracheae, tracheids; solvents: alcohol, water; contains tannin 10-28 p.c., gallic acid, resin, crystalline principle, geranium-red, a phlobaphene formed from the tannin, ash 8 p.c. Astringent, tonic; diarrhea, chronic dysentery, hemorrhages, gleet, leucorrhea, aphthae, relaxed vagina, throat, uvula, rectum, indolent ulcers. Dose, gr. 15-60 (1-4 Gm.); 1. Fluidextractum Geranii (75 p.c. alcohol). Extract;Tincture; Decoction, 5 p.c. (water or milk); "Eclectic" geranin.
G. Robertia'num. -- Europe; popular astringent for hemorrhage, diuretic for gravel. Ero'dium (Geranium) moscha'tim, Stork's-bill; diaphoretic. E. Cicuta'rium, Heron's-bill; diuretic for dropsy.