Rhubarb

Literature References: Rhizome and roots of Rheum officinale Baill., R. palmatum L., or other Rheum spp, Polygonaceae. Habit. Central Asia; cultivated in Europe, Southern Siberia, North America. Constit. Chrysophanic acid, emodin, rhein, rheotannic acid, erythroretin, methylchrysophanic acid, rhabarberon, cinnamic and gallic acids, calcium oxalate. Comprehensive studies: Workman, Hiner, J. Am. Pharm. Assoc. 49, 118 (1960). Incompat. Mineral acids, iron salts, lead acetate, zinc salts, lime water; infusions of catechu, cinchona, and nutgall; tartar emetic, tannic acid.