This name is a synonym of Gibbaeum gibbosum (Haw.) N.E.Br..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Gard. Chron. III, 70: 151 1922.
This name was in version 1 of The Plant List, record kew-2825201, and has not been changed.