This name is a synonym of Plectranthus montanus Benth..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 158119) with original publication details: Fl. Pl. South Africa 24: t. 946 1944.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:454417-1.
This name was in version 1 of The Plant List, record kew-158119.