I'lex verticilla'ta (Pri'nos verticila'tus), Prinos, Black Alder, Winter-berry. -- Ilicaceae (Aquifoliaceae). The bark, U.S.P. 1820-1880; N. America, swamps; shrub, 2-2.5 M. (6-8 degrees) high; leaves serrate, pubescent beneath; flowers white; fruit scarlet berry, size of pea. Bark thin, fragments 1 Mm. (1/25') thick, brown-ash color, with white patches, black dots and lines; inner surface greenish, striate, bitter, astringent; contains tannin, resin, bitter principle. Astringent, tonic, alterative, febrifuge, substitute for cinchona; diarrhea, fevers, ulcers, etc. Dose, 3ss-1 (2-4 Gm.); decoction, fluidextract.