This name is a synonym of Haworthia coarctata Haw..
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 277038) with original publication details: Notizbl. Königl. Bot. Gart. Berlin 4: 247 1906.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:536019-1.
This name was in version 1 of The Plant List, record kew-277038.