See list Grusonia is a genus of opuntioid cacti (family Cactaceae), originating from the North American Deserts in Southwest United States and northern Mexico, including Baja California.

Molecular phylogenetic studies suggest that it should be included in Grusonia, a view accepted by Plants of the World Online as of June 2021[update].

[3][4][5][6][7][8] Whilst Corynopuntia members are morphologically similar one to each other, the mentioned research studies highlighted that wild club chollas rarely naturally hybridize when they grow sympatric.

The genus Corynopuntia was first set up in 1935[9] as a segregate from Opuntia, but was reduced to sectional rank by Benson in 1969 and slightly elevated again to a subgenus by Bravo in 1972.

Club chollas grow generally in very dry areas, on flats or gentle slopes, fully exposed to the sunlight or sometimes under sparse bushes.