- It is native to the lower elevations of the Mexican state of Sonora and the area around Phoenix, Arizona ... somewhat rare, but also seen around southern Arizona
- Found near mostly rocky soils, coastal mountains, and in thin forests
- Considered "near threatened" by International Union for Conservation of Nature (IUCN) and is under threat by urban development
- It was first described as Mammillaria Boolii in 1953 by George Edmund Lindsay
- The specific epithet boolii honors the American Herbert W Bool, the discoverer of the species and founder of the Botanical Garden in Phoenix
- Blossoms in summer like this one in Jim's yard!