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hedgehog cactus

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noun
  1. any of various rounded, usually spiny cacti of the genus Echinocereus, of the southwestern U.S. and Mexico, having bell-shaped flowers that close at night.
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Origin of hedgehog cactus

An Americanism dating back to 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018