Name:Radix et Rhizoma Rhei, Rhubarb, Daihuang

Source:dried root and rhizome of Rheum palmatum L., Rheum tanguticum Maxim.ex Balf. or Rheum officinale Baill.(Fam. Polygonaceae)

Chemical compositions: anthraquinones

Specifications:original shape(root and rhizome), slice, or powder(brown yellow as picture ).