This name is a synonym of Plectranthus kanneliyensis (L.H.Cramer & Balas.) R.H.Willemse.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45974) with original publication details: Kew Bull. 32: 558 1978.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446035-1.
This name was in version 1 of The Plant List, record kew-45974, and has not been changed.