This name is a synonym of Plectranthus lasianthus (Gürke) Vollesen.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 46145) with original publication details: Bothalia 6: 227 1951.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446206-1.
This name was in version 1 of The Plant List, record kew-46145.