This name is a synonym of Gasteria obliqua (Aiton) Duval.
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym and as an illegitimate name (record 297746) with original publication details: Trans. Linn. Soc. London 7: 14 1804.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:529713-1.
This name was in version 1 of The Plant List, record kew-297746.