冬虫夏草为麦角菌科植物冬虫夏草菌(CordycepssinenslsBerksace)。具有补肺益肾,止血化痰的功效,为名贵中药材之一。由于价格较高,因此常有伪品亚香棒虫草、草石蚕和淀粉伪制品等出现,为便于区别现将冬虫夏草与三种伪品的性状及显微特征分述如下。1　真品的性状及显微特征冬虫 Cordyceps sinensis is Cordyceps sinensls Berksace. With Bufei Yishen, the effect of bleeding and phlegm is one of the precious Chinese herbal medicines. Due to the high price, there are often false stems of Asian Cordyceps militaris, grass silkworm silkworms and starch pseudo-products, etc., in order to facilitate the distinction between the characters and microscopic characteristics of Cordyceps sinensis and the three counterfeit products are described below. 1 Characters and microscopic features of authentic products