Rhinoceros Cactus
Scientific Name: Coryphantha cornifera (De Candolle) Lemaire
Synonym: Coryphantha bernalensis, Coryphantha cornuta, Coryphantha maliterrarum, Coryphantha radians, Coryphantha radians, Coryphantha schwartziana, Mammillaria cornifera
Family: Cactaceae
Coryphantha cornifera at the Desert Botanical Garden
USDA: 9-11
Frost Tolerance: Hardy at least to 23° F (-5° C)
Heat Tolerance: Light shade in summer in Phoenix
Sun Exposure: Full sun
Origin: Ixmiquilpan, in the state of Hidalgo (Mexico)
Growth Habits: Solitary globose to cylindrical, up to 6 inches in diameter (15 cm), 5 inches tall (5 inches); 0 or 1( to 3) dark central spines, 0.6 inch (1.5 cm) long; 12 to 20 radial spines, 0.36 to 0,5 inch (0.9-1.2 cm) long;
Propagation: Seeds
Blooming Habits:
The Coryphantha cornifera has 2 to 2.4 inches wide (5-6 cm) yellow flowers (occasionally red), 2.8 inches long (7 cm).
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