[Study on origin and species of Heshouwu]

Recently the safety of Heshouwu become a focus, but the reasons of its hepotoxicity are confused. On the basis of literature research, some findings on species and usage custom maybe supply some clues to explain the reasons of its hepotoxicity. Heshouwu had red Heshouwu (male) and white Heshouwu (female) in ancient literature, and traditional usage was use of the male and female together. The Latin name of red Heshouwu is Fallopia multiflora, and that of the white one is F. multiflora var. multiflora.