Coryphantha alversonii

Coryphantha alversonii, commonly known as the foxtail cactus, is a stem succulent plant in the genus "Coryphantha" of the cactus family (Cactaceae).
The cactus is endemic to southern California, found only in the mountain ranges of the southern Mojave Desert.
Description.
"Coryphantha alversonii" has black tipped spines and lavender flowers.
It is vulnerable species on the California Native Plant Society Inventory of Rare and Endangered Plants.