中药三白草别名五路叶白、白水鸡、塘边藕,为三白草科植物三白草的干燥地上部分。三白草为多年生草本植物,高30~70cm。根状茎肉质,白色,有须状根。茎直立,有棱脊,无毛。单叶互生,叶片卵形或披针状卵形,先端尖或长尖,基部心形,全缘,两面均无毛;在茎端花序下的2~3片叶,开花时常乳白色;托叶与叶柄合生。总状花序生于枝顶与叶对生,花序梗有毛;花小;雄蕊6枚,雌蕊由4枚近完全合生 Chinese medicine Siberian grass alias five-way leaf white, white water chickens, pond side lotus root, for the Siberianaceae plant Saururus dry ground parts. Sambucao perennial herb, high 30 ~ 70cm. Rhizomes succulent, white, with fibrous roots. Stem erect, ridged, glabrous. Leaf blade ovate or lanceolate ovate, apex acute or pointed, base cordate, entire, both surfaces glabrous; 2 or 3 leaves below inflorescence of stem, flowering often milky white; stipules Coexistence with petiole. Raceme born on top of branches and leaves opposite, hairy peduncle; flowers small; stamens 6, pistils nearly 4 connate