Producing area: Growing in the river valley, wet grassland, forest and bosks. Origin from Inner Mogolia and Daxinganling Area of Heilongjiang Province. It can be cultivated. chemical ingredient : The whole plant contains naphtha. The root contains various Coumarins comound: Angelicin, byakangelicol, oxypeucedanin and jmperatorin etc. Package type: Vacuum plastic bags,2.5kg/bags,10kg/carton,20kg/carton, 25kg/carton.