The comparative study of Pogostemon cablin in different production area

The traditional Pogostemon cablin drugs were divided into three types, including Shipai Pogostemon cablin,Gaoyao Pogostemon cablin(Zhaoqing Pogostemon cablin) and Hainan Pogostemon cablin(including Zhanjiang Pogostemon cablin).Because of the difference of historical origins,ecology environment of product area,planting condition,harvesting time and the method of process,there was difference in properties and quality of drugs from three product areas.In addition,there were certain difference in growing,leaf's shape and color.The difference of internal structure of stem and leaf also had difference.According to compare characteristics out and inside,we can identify and assure Pogostemon cablin of different production area.