This name is a synonym of Haworthia reinwardtii f. zebrina (G.G.Sm.) M.B.Bayer.
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 309535) with original publication details: J. S. African Bot. 10: 18 1944.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:60426855-2.
This name was in version 1 of The Plant List, record kew-309535, and has not been changed.