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Melocactus caroli-linnaei : ウィキペディア英語版 | Melocactus caroli-linnaei
''Melocactus caroli-linnaei'' is a cactus (a member of the family Cactaceae) found in Jamaica. When mature it is columnar, up to high. Like all species of ''Melocactus'', it forms a "cephalium" when mature – a dense mass of areoles covered with wool and spines at the tip of the stem. Flowers are produced only from the cephalium.〔, pages=456–459〕 The species was originally named ''Cactus melocactus'' by Carl Linnaeus in 1753. The genus ''Cactus'' was later split and the pre-Linnaean name ''Melocactus'' was used for melocacti. The rules of botanical nomenclature forbid the repetition of a genus name and a specific epithet, so the name "''Melocactus melocactus''" is not allowed. In 1991, Nigel Taylor gave the species its current name, ''Melocactus caroli-linnaei''.〔 ==References==
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