Spider Cactus
Scientific Name: Gymnocalycium denudatum (Lk. & Otto) Pfeiff.
Synonym: Cereus denudatus, Echinocactus denudatus
Family: Cactaceae
USDA: 9b-10
Frost Tolerance: Hardy in Phoenix to 25°F (-4°C)
Sun Exposure: Full sun to light shade
Origin: Brazil (Rio Grande do Sul)
Growth Habits: Glossy dark green ball, up to 3 to 6 inches in diameter (15 cm), up to 4 inches tall (10 cm)
Propagation: Seeds (seldom produces offsets)
The name Spider Cactus refers to the shape of the spines, looking like a bunch of spiders crawling on a cactus. The 'chin' effect is not as visible as other Gymnocalycium.
As Echinocactus denudatus in K. Schumann
Blooming Habits:
White to pale pink flowers, that are up to 3 inches in diameter (7 cm).
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