摘要

Morphological and microscopic features of root of one to five-year-old Panax quinquefolius L. grown on Canada has been authenticated.The study includes also fibrous root, powder and maceration of root. The methods used in this research could be adopted to distinguish one to five-year-old Radix Panacis Quinquefolii imported from Canada, which is available or presented as mixtures in the raw root selling markets in China. The peduncle of terminal umbel, starch grain, calcium oxalate cluster crystals and secretory canal and the number of "Lo Bowl" characteristics have been presented. It is therefore suggested that the roots could be used to authenticate the one to five-year-old P. quinquefolius grown in Canada.