Polygonum multiflorum Thunb, also known as Polygonum multiflorum Thunb, Polygonum multiflorum Thunb, etc. 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 southern Shaanxi, southern Gansu, East China, Central China, South China, Sichuan, Yunnan and Guizhou.
Trait identification
The tuberous root is spindle-shaped or lumpy, generally slightly curved. The length is 5- 15cm and the diameter is 4- 10cm. The surface is reddish brown or reddish brown, uneven, with irregular longitudinal grooves and dense wrinkles, and horizontal lenticels and fine root marks.
Hard, not easy to break. The cut surface is yellowish brown or reddish brown, powdery, and the skin has round-like abnormal vascular bundles arranged in a ring, forming a brocade pattern, with a large central wood and some wood hearts. Slight gas, slightly bitter and sweet taste. It is better to be solid in weight and quality and full of powder.