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Melocactus caroli-linnaei

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Melocactus caroli-linnaei is a cactus (a member of the family Cactaceae) found in Jamaica. When mature it is columnar, up to Template:Convert 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.<ref name=Ande01p456>Template:Citation, pages=456–459</ref>

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.<ref name=Ande01p456/>

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