Echinomastus
Echinomastus was a formerly recognized genus of cacti., it is accepted as a synonym of Sclerocactus. Species formerly placed in the genus are native to the southwestern United States and Mexico.
Former species
Formerly accepted species include:- Echinomastus erectocentrus → Sclerocactus johnsonii subsp. erectocentrus
- Echinomastus johnsonii → Sclerocactus johnsonii
- Echinomastus mariposensis → ''Sclerocactus mariposensis''