防己为常用中药 ,系防己科植物粉防己 Stephania tetrandraS. Moore的干燥根 ,具有利水消肿、祛风止痛之功效 [1 ] 。最近 ,笔者发现一种混伪品 ,与正品性状相似 ,经鉴定为毛茛科植物单叶铁线莲 Clematis henryi Oliv.的干燥根 ,药材习称拐子药。为此 ,本文从性状、显微、紫外 Anti-herb is a commonly used traditional Chinese medicine, which is the dry root of Stephania tetrandraS. Moore, which is a kind of anti-herbaceous plant. It has the advantages of water swelling, and hurricane analgesia [1]. Recently, the author found a counterfeit product that was similar to the authentic one and was identified as the dried root of Clematis henryi Oliv., a single-leaf clematis plant in the Ranunculaceae family. Herbs are commonly referred to as abbreviations. To this end, this article from traits, microscopic, ultraviolet