| Homalocephala | |
|---|---|
|   | |
| Homalocephala polycephala | |
|  Scientific classification   | |
| Kingdom: | Plantae | 
| Clade: | Tracheophytes | 
| Clade: | Angiosperms | 
| Clade: | Eudicots | 
| Order: | Caryophyllales | 
| Family: | Cactaceae | 
| Subfamily: | Cactoideae | 
| Tribe: | Cacteae | 
| Genus: |  Homalocephala  Britton & Rose [1]  | 
| Type species | |
|  Homalocephala texensis  | |
| Species | |
See text.  | |
Homalocephala is a genus of plants native to Mexico and the United States. [1] In the past, all three species have been considered to be in the genus Echinocactus . [2]
As of June 2025 [update] , Plants of the World Online accepts three species:
| Image | Scientific name | Common name | Distribution | 
|---|---|---|---|
|   |  Homalocephala parryi (Engelm.) Vargas & Bárcenas syn. Echinocactus parryi  | Devil's cushion | Mexico | 
|   |  Homalocephala polycephala (Engelm. & J.M.Bigelow) Vargas & Bárcenas syn. Echinocactus polycephalus  | Cotton top cactus | S. California, S. Nevada, Arizona, Mexico | 
|   |  Homalocephala texensis (Hopffer) Britton & Rose syn. Echinocactus texensis  | Horse crippler cactus | SW. Oklahoma to NE. Mexico |