Xanthorrhi'za apiifo'lia, Shrub Yellow-Root. -- The rhizome and roots, U.S.P. 1820-1870; S. and C. United States. Shrub .6-1 M. (2-3 degrees) high, stem clustered, 6 Mm. (1/4') thick, wood yellow, leaves compound, flowers April, purple, racemes, rhizome .6-1 M. (2-3 degrees) long, 12 Mm. (1/2') thick, yellowish internally and externally, bitter; contains berberine, resin, starch, gum, etc. Used as a tonic like calumba or quassia; in infusion, decoction, tincture. Dose, 3ss-1 (2-4 Gm.).