Polygonum multiflorum Thunb (scientific name: Fallopia multiflora (Thunb.) Harald.), also known as Polygonum multiflorum Thunb, Polygonum multiflorum Thunb. Polygonum multiflorum Thunb. is a perennial twining vine of Polygonum family of Polygonaceae, with thick tuberous roots, long oval shape and dark brown color. Shrubbery in valleys, forests on hillsides, and stone crevices beside ditches. Produced in southwestern Shaanxi, southern Gansu, eastern China, central China, southern China, Sichuan, Yunnan and Guizhou.