This name is a synonym of Plectranthus caninus subsp. flavovirens (Gürke) A.J.Paton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45928) with original publication details: Pflanzenw. Ost-Afrikas C: 347 1895.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:445988-1.
This name was in version 1 of The Plant List, record kew-45928.