Blooming Graham's Nipple Cactus 01.
Tags: arizona,gila monster house,grahams nipple cactus,pima county,pistol hill community,rincon mountains,rincon valley

Flowering Graham's Nipple Cactus.
Tags: grahams nipple cactus,mammillaria grahamii,rincon valley

Blooming Graham's Nipple Cactus 02.
Tags: arizona,gila monster house,grahams nipple cactus,pima county,pistol hill community,rincon mountains,rincon valley