This name is a synonym of Plectranthus mahonii (Baker) N.E.Br. ex Hook.f..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 46011) with original publication details: Fl. Trop. Afr. 5: 434 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446073-1.
This name was in version 1 of The Plant List, record kew-46011, and has not been changed.