Commonly called fishhook cactus or pincushion cactus
Fishhook Cactus, Mammillaria dioica, strawberry cactus, California fishhook cactus, strawberry pincusion, cactus, Mammillaria, biznaga llavina, Mojave, Mojave Desert, Sonoran, Desert, Sonoran Desert, Randall Henderson Loop Trail, Santa Rosa and San Jacinto Mountains National Monument, Palm Desert, California
The only one blooming I’ve seen all week out here