The Siberian moonseed (Menispermum dauricum) belongs to the family Menispermaceae. It is a deciduous woody vine that is native to Japan, the Korean Peninsual, China and eastern Siberia. This vine grows in mountains and twines around other plants. The leaves are reniform-round, 3-7 lobes, and arranged in alternate. It is dioecious. The small pale yellow flowers bloom in axillary small panicles from May to June. The fruits are drupes and ripen blackish-purple. This root is called "Boi" and used as a traditional medecine for diuretic in China.