Coryphantha octacantha
Synonym: Mammillaria clava, Mammillaria macrothele, Coryphantha clava, Coryphantha asterias, Mammillaria octacantha, Coryphantha macrothele
Family: Cactaceae
 Coryphantha clava at Kuentz Nursery in early June |
Recommended Temperature Zone: USDA: 9b-11 Frost Tolerance: 25° F (-4°C) Minimum Avg. Temperature: 50°F (10°C) Heat Tolerance: Light shade in Phoenix in summer Sun Exposure: Full sun to partial shade Origin: Mexico (Hidalgo, Queretaro) Growth Habits: Mostly solitary, club-shaped stems, 12 inches tall (30 cm), up to 4 inches wide (10 cm), clustering with age; 1 to 2 central spines, 1 inch (2.5 cm) long; 6 to 8 radial spines, 0.6 inch (1.5 cm) long Watering Needs: Water sparingly, needs good drainage. Keep drier in winter Propagation: Seeds |
The name octacantha is coming from the 8 radial spines for each areole.
Blooming Habits:
Very large 3 inches wide (7 cm) straw-yellow flowers, in summer. Spineless green fruit.
Fruiting Habits:
Check for Field Collection numbers at Ralph Martin's Site
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