⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2739618, and has not been changed.
This name is a synonym of Coryphantha difficilis (Quehl) Orcutt.
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Repert. Spec. Nov. Regni Veg. 30: 57 1932.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:66537-2.