Mammillaria spinosissima,flowering cactus. Pink or white flowered form. White spines to deep reddish brown, very pretty cactus.
It is an easy cactus to grow, keep in bright light, and quite dry through the winter. With age the cactus forms offsets. Spines can vary from white to deep reddish brown.
In spring, Mammillaria spinosissima produces flowers that form a ring around the top of the stem/ body. The flowers are purplish or deep pink and occasionally white for this listing.