Small, usually solitary, globose cactus from higher altitudes (>2000m) across a wide range in Mexico. Plants are 1-5 inches in diameter and retract into the soil during times of drought. They have thick roots, 9-12 ribs, 3-7 short spines per areole. Pink, magenta or white flowers to 3 inches in diameter appear laterally.

3 former subspecies of this plant (acanthosetus, sharpii, weinbergii) have since been split and are now species in their own right.

Found in the Mexican states of Oaxaca, Puebla, Hidalgo, and Querétaro.

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