Coryphantha retusa
Scientific Name: Coryphantha retusa (Pfeiffer) Britton & Rose
Synonym: Cactus cephalophorus, Coryphantha melleospina, Coryphantha retusa var. melleospina , Echinocactus cephalophorus, Mammillaria cephalophora, Mammillaria retusa, Melocactus mammillariaeformis
Family: Cactaceae
Coryphantha retusa at the Desert Botanical Garden in October
Frost Tolerance: Hardy at least to 25° F (-4° C)
Heat Tolerance: Light shade in summer in Phoenix
Sun Exposure: Full sun
Origin: Mexico (Oaxaca, Puebla)
Growth Habits: Generally clumping depressed spherical 4 inches (10 cm) in diameter; 0 central spines; 6 to 12( to 15) radial spines
Propagation: Seeds, offsets
Blooming Habits:
The Coryphantha retusa has 1.5 inches wide (4 cm) cream or yellow flowers.
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