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 45948) with original publication details: Bull. Herb. Boissier 2: 126 1894.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446008-1.
This name was in version 1 of The Plant List, record kew-45948, and has not been changed.