This name is a synonym of Gasteria carinata var. verrucosa (Mill.) van Jaarsv..
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 298127) with original publication details: Bot. Beob. 1783 63 1783.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:530021-1.
This name was in version 1 of The Plant List, record kew-298127, and has not been changed.