This name is a synonym of Conophytum gratum subsp. marlothii (N.E.Br.) S.A.Hammer.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Notes Mesembryanthemum 3: 23 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:361183-1.
This name was in version 1 of The Plant List, record kew-2734997, and has not been changed.