This name is a synonym of Plectranthus dupuisii (Briq.) A.J.Paton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 46016) with original publication details: Annuaire Conserv. Jard. Bot. Genève 2: 239 1898.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446079-1.
This name was in version 1 of The Plant List, record kew-46016.