香加皮习称五加皮,为萝藦科植物杠柳的干燥根皮。五加皮习称南五加皮,为五加科植物五加的干燥根皮。地骨皮为茄科植物枸杞或宁夏枸杞的干燥根皮。香加皮、五加皮同为祛风湿药,而香加皮有毒;地骨皮为清热凉血、退骨蒸药。三种药材商品上常有混淆,其鉴别如下: Xiangjiapi is known as Wujiapi, which is the dry root bark of Salix communis. Wujiapi is known as the southern Wujiapi, which is the dry root bark of the Araliaceae. Digupi is the dry root bark of Solanaceae or Ningxia. Xiangjiapi and Wujiapi are also used as rheumatic drugs, while Xiangjiapi is toxic. Digupi is used as heat-removing and cooling blood and bone retreat. There are often confusions among the three medicinal products, which are identified as follows: