This name is a synonym of Plectranthus persoonii Hedge.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 137028) with original publication details: Syn. Pl. 2: 135 1806.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:453058-1.
This name was in version 1 of The Plant List, record kew-137028, and has not been changed.