Sea Urchin Cactus is a small, globular cactus with prominent tubercles and dense, radiating spines that give it a sea urchin-like appearance. The spines are typically white to pale yellow. It produces large, yellow flowers with orange centers in summer.
| Family: | Cactaceae (kak-TAY-see-ee) |
| Genus: | Coryphantha (kor-ry-FAN-tha) |
| Species: | echinus (EK-in-us) |
| Synonym: | Coryphantha radians var. echinus |
| Synonym: | Coryphantha cornifera var. echinus |
| Synonym: | Coryphantha pectinata |
| Synonym: | Mammillaria radians var. echinus |
| Synonym: | Mammillaria echinus |
Full sun and very well-draining mineral soil. Water sparingly. The dense spines protect the plant from intense sun. Slow-growing but rewarding. The large flowers are a beautiful contrast to the spiny body. Ideal for small pots and rock gardens.
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