Mammillaria huitzilopohctli

This cactus is a very spherical dark green globe. It has dense close to stem spines that curve inwards. When they begin to bloom they produce gorgeous rings of bright pink/magenta flowers.

Recommended temperature zone: USDA: 10b-11
Frost tolerance: Probably tender below 32°F (0°C), avoid frost
Minimum avg. temperature: 50°F (10°C)
Sun Exposure: Light shade
Origin: Oaxaca (Mexico)
Growth habits: Solitary, club-shaped, up to 5" tall (13 cm), 3.5 "wide (8 cm); generally no central spines
Watering needs: Moderate water. Keep dry in winter.

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz