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贯众品种混乱,曾被认为是贯众的原植物有:Woodwardia radicans、Dryopteris filix-mas、Gnoelea orientalis、Cyrtomium falcatum、Lomaria japonica、Cyrtomium fortunei,1930年的中华药典绵马项后括弧内注有贯众二字,原植物为D.filix-mas。我国近代第一个对贯众品种进行系统调查研究的是管光地先生,1932年他发现在药店两次购买的贯众都不足药典文献的D.filix-mas的根茎和叶柄残基,而且两次所购之贯众也互不相同;对此,他进行了研究。其结论是国内外绵马共6种,伪品4种,贯众知道名字
The Guanzhong species is confusing. The original plants that were once known as Guanzhong are: Woodwardia radicans, Dryopteris filix-mas, Gnoelea orientalis, Cyrtomium falcatum, Lomaria japonica, Cyrtomium fortunei. The second word, the original plant is D. filix-mas. The first systematic survey of Guanzhong breeds in modern China was conducted by Mr. Guan Guangdi. In 1932 he discovered that Guanzhongdu, which was purchased twice at pharmacies, lacked the rhizome and petiole residues of D. filix-mas in the pharmacopoeia literature. The two purchased Guanzhong also differ from each other; for this, he conducted research. The conclusion is that there are 6 kinds of Mama at home and abroad, and 4 kinds of counterfeit products.