chinese name: da huang botanial name: rheum palmatum english name: rhubarb [origin habitat ]: si chuan , gan su [chemical composition ]: rhein , emodin , chrysophanol , aloe- empdoin , physcion , sennodidea , b , c , d , rhein-8-β-d-glucoside , physcion monoglucosode , emodin mon-oglucoside , chrysophanol monogluxoside , in addition , there is tannins , glucogallin , catechin , gallicacid , and tetrarin . [p harmacological action ]: 1. having flows swiftly affects . 2. to resist bacteria and virus. 3. be favorable to gallbladder . 4. having restraing and sterilization . 5. to stop blooding .