This name is a synonym of Plectranthus scebeli (Chiov.) Ryding.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 46092) with original publication details: Fl. Somala 1: 2 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446155-1.
This name was in version 1 of The Plant List, record kew-46092, and has not been changed.