中药大蓟系来源于中国蓟ＣｉｒｓｉｕｍｃｈｉｎｅｎｓｅＧａｒｄｎ．ｅｔＣｈａｍｐ．和日本蓟ＣｉｒｓｉｕｍｊａｐｏｎｉｃｕｍＦｉｓｃｈ．ｅｘＤＣ．的全草，两者的生药相似，难于区别。为此对内者的叶进行显微鉴别研究。结果表明，两者叶的表皮、叶肉、中脉、维管束等均有差异，列出了显微鉴别要点检索表供鉴别依据。 The Chinese herbal medicine is derived from Cirsium chinense Gardn. etChamp. And Japanese 蓟CirsiumjaponicumFisch. exDC. The whole grass, both of which are similar in raw medicine, is difficult to distinguish. For this purpose, microscopic identification studies were carried out on the inner leaves. The results showed that there were differences in the epidermis, mesophyll, midrib, and vascular bundles of the two leaves, and the microscopic identification points retrieval table was listed for identification.