This name is a synonym of Plectranthus caillei (A.Chev. ex Hutch. & Dalziel) B.J.Pollard.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45873) with original publication details: Fl. W. Trop. Afr. 2: 291 1931.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:445931-1.
This name was in version 1 of The Plant List, record kew-45873.