Pilosocereus is a genus of cactus. It was known as Pilocereus up until 1954 when it was renamed due to a discrepancy found according to the rules of botanical nomenclature. This earlier name meant felted Cereus. Both names refer to the very hairy areoles on the stems. In the wild, Pilosocereus is widespread from Mexico and in the Caribbean Islands, down throughout South America.
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