Thelocactus

Other synonyms include:
Thelocactus conothele
Pediocactus smithii
Neolloydia smithii
Echinocactus conothel...Read Moree
Echinocactus smithii
Gymnocactus conothele
Gymnocactus beguinii var. smithii
Torreycactus conothele
Thelocactus conothelos var. conothelos

The 'conothelos' subspecies usually grows single stemmed & globose; the tubercles are not obscured by the spines. It has 1 to 4 central spines and 10-16 radial spines. The flowers are magenta to white or light pink with a darker pink midstripe.
The 'argenteus' subspecies grows a solitary single globose or cylindrical stem with the tubercles mostly obscured by spines. The central spines are creamy-white and shredding with age. It has roughly 20 glassy-silvery-grayish-white radial spines. The flowers are a more solid deep pinkish and/or pink-purple.
The 'aurantiacus' subspecies grows a solitary single globose or cylindrical stem with the tubercles mostly covered by spines. It has 4 central spines and 17-23 radial spines that are glassy-white with yellow bases. The flowers are solid orange-yellow to burnt orange or bright yellow.

Solitary cactus with a brilliant pink flower in the late winter. Plant itselt looks a lot like a robust Mammillaria, but flower much larger.