天麻Gastrodia elata Blume是兰科多年生草本植物的地下块茎。主产于四川、云南、贵州、陕西等省。临床多应用于治疗肝阳上亢或风痰所引起的头痛、眩晕等症,疗效较显著。但由于药源紧缺,不能满足需要,因此市场出现不少伪品,有的甚至中毒,影响人民身体健康。常见伪品有①紫茉莉Mirabilis jalapa L.(紫茉莉科)的根。经蒸后刮去外皮干燥而成。②大丽菊Dahlia Gastrodia Gastrodia elata Blume is the underground tuber of Orchidaceae perennial herb. Mainly produced in Sichuan, Yunnan, Guizhou, Shaanxi and other provinces. The clinical application is more effective in treating headaches and dizziness caused by liver yang hyperactivity or wind phlegm. However, due to shortages of medicines, they cannot meet the needs. Therefore, there are many counterfeit goods in the market, and some even poison, affecting people’s health. Common artifacts are the roots of Mirabilis jalapa L. (Myrobalaceae). After steaming, the outer skin is dried and scraped. 2 Dahlia Dahlia