This name is a synonym of Plectranthus chevalieri (Briq.) B.J.Pollard & A.J.Paton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 46038) with original publication details: Explor. Bot. Afrique Occ. Franç. 1: 519 1920.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446100-1.
This name was in version 1 of The Plant List, record kew-46038, and has not been changed.