Frase'ra carolinen'sis (Walte'ri), American Colombo. -- The root, U.S.P. 1820-1870; United States. Perennial herb, 1-2.5 M. (3-8 degrees) high, dark purple stem 2.5-5 Cm. (1-2') thick; leaves in whorls 4-6, entire, spatulate; flowers July, yellow, purple-dotted, large; root fusiform, fleshy, yellow. Usually in segments 2.5 Cm. (1') thick, annulate, orange-brown; odor gentian-like; taste sweet, bitter; constituents and uses like gentian. Dose, gr. 15-30 (1-2 Gm.).