Frost Tolerance: Hardy in Phoenix, hardy to 20° F (-7°C)
Sun Exposure: Light shade in summer in Phoenix, else full sun
Origin: Chihuahua desert of northern and central Mexico, Texas
Growth Habits: Globular stem cactus up to 4 inches in diameter (10 cm)
The second and third pictures are of Thelocactus bicolor v. schottii.
There are a number of varieties of Thelocactus bicolor
Name | Min. Temp | Origin | |
Thelocactus bicolor var. bicolor | 20° F (-7°C) | Mexico | |
Thelocactus bicolor var. bolansis | 10° F (-12°C) | Coahuila | from Sierra Bola, 8 inches tall (20 cm) |
Thelocactus bicolor var. flavidispinus | 10° F (-12°C) | Texas | 3 inches in diameter (8 cm), 2 inches tall (5 cm) |
Thelocactus bicolor var. schottii | 10° F (-12°C) | Texas, Chihuahua | now considered synonymous with var. bicolor |
Thelocactus bicolor var. schwarzii | 10° F (-12°C) | Tamaulipas | |
Thelocactus bicolor var. tricolor | 20° F (-7°C) |
Blooming Habits:
Pink and white flowers.
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