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Rhinoceros cactus

Coryphantha cornifera is thought to be the taxon classified in 1828 by de Candolle as Mammillaria radians, but this is unclear, partly because of various name changes over the years. However the range of both Coryphantha radians and Coryphantha cornifera is identical, and at most locations adult plants, either without central spines ("radians"), or with 1-4 central spines ("cornifera") can be found. The arrangement of the central spines is variable. More

Coryphantha cornifera at the Desert Botanical Garden Recommended Temperature Zone: USDA: 9-11 Frost Tolerance: Hardy at least to 23 F (-5 C) Minimum Avg. More