chin cactus

chin cactus

noun
any of various globular cacti of the genus Gymnocalycium, native to South America, having white or pinkish flowers and a chinlike protrusion below each cluster of spines.
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Encyclopedia Britannica
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chin cactus

any of about 50 species of the genus Gymnocalycium, family Cactaceae, native to South America and named for the chinlike protuberance below each spine-bearing areole (special bud) on the ribs. Many natural and cultivated varieties are available, the most outstanding of which is G. mihanovichii Hibotan, a glowing red, which must be grown grafted onto a normal cactus because it lacks chlorophyll and cannot synthesize its own food. Varieties of other colours also have been developed and are seen in the florist trade.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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