325. PRINOS.—BLACK ALDER. WINTERBERRY. The bark of I'lex verticilla'ta Gray. Habitat: North America, in swampy thickets. Thin, yellowish-green fragments, usually deprived of the grayish or brownish periderm, which, when present, is marked with whitish patches and black lines and dots; inodorous; taste bitter and slightly astringent. It contains tannin, wax, sugar, resin, starch, chlorophyll, and a yellow, amorphous, bitter principle. Used as a tonic, antiperiodic, and astringent. Dose: 15 to 60 gr. (1 to 4 Gm.).
A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.