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Taxonomy of Nepenthes : ウィキペディア英語版 | Taxonomy of Nepenthes
The taxonomy of ''Nepenthes'' has been revised several times during the nineteenth and twentieth centuries. ==Nineteenth century== The first subgeneric division of the ''Nepenthes'' was made by Joseph Dalton Hooker in his 1873 monograph, "Nepenthaceae". Hooker distinguished ''N. pervillei'' from all other taxa based on its seeds, which lack the appendages typical of most ''Nepenthes''. He placed it in the monotypic section ''Anourosperma''. All other species were subsumed in the second section, ''Eunepenthes''. A second attempt to establish a natural subdivision within the genus was made in 1895 by Günther Beck von Mannagetta und Lerchenau in "Die Gattung ''Nepenthes''". Beck kept the two sections created by Hooker, but divided ''Eunepenthes'' into three subgroups: ''Apruinosae'', ''Pruinosae'', and ''Retiferae''.
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