Devil Cholla, Stanly's Club Cholla (Grusonia emoryi)

Devil Cholla, Stanly's Club Cholla
Scientific Name: Grusonia emoryi Engelm.
Synonym: Opuntia emoryi, Opuntia stanlyi, Corynopuntia stanlyi, Grusonia stanlyi
Family: Cactaceae

Opuntia stanlyi at the Desert Botanical Garden Recommended Temperature Zone:
sunset: 10-13
USDA: 8b-11

Minimum Avg. Temperature: 50°F (10°C)
Heat Tolerance: Water some in Arizona in summer to keep lush
Sun Exposure: Full sun
Origin: Plains and mesas, USA (Arizona, southwestern New Mexico), Mexico (Baja California), 2500 to 4000 ft. elevation
Growth Habits: Shrubby cactus, up to six inches high (15 cm), rarely to 1 foot (30 cm), forms mats up to 7 feet across (2 m) or more
Watering Needs: Little to no water.
Propagation: Cuttings

Although the species name stanlyi was used earlier, it was not validly published. As a consequence emoryi is now the valid species epithet.

Blooming Habits:
Yellow flowers in late spring, up to 2 inches in diameter (5 cm), 3 inches in length (7 cm). They are followed by a yellow fruit, 2-3 inches long (5-8 cm).

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