Erythrae'a Centau'rium, Centaurium, Centaury, N.F. -- The dried flowering herb with not more than 3 p.c. of foreign organic matter; C. and S. Europe. Plant glabrous, 15-50 Cm. (6-20') high, branched, leaves opposite, entire, sessile, ovate, obovate; flowers cyme, rose-colored, calyx 5-parted, stamens 5, bright yellow, pistil 2, carpelled; odor faint, characteristic; taste persistently bitter. Powder, brownish-yellow--wood-fibers, wood parenchyma and tracheae, calcium oxalate rosettes or prisms, non-glandular hairs, few stomata, chlorophyll, tissue of petals and calyx with papillated cells, abundant pollen grains, small stone cells of seed-coat, pith and cortical parenchyma; solvent: diluted alcohol; contains erythrocentaurin (bitter glucoside), erytaurin, waxy and saline substances. Tonic, bitter; dyspepsia, similar to gentian and chirata. Dose, 3ss-1 (2-4 Gm.); 1. Tinctura Amara, 6 p.c.