This name is a synonym of Plectranthus grandicalyx (E.A.Bruce) J.K.Morton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45953) with original publication details: Hooker's Icon. Pl. 34: t. 3391 1939.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446013-1.
This name was in version 1 of The Plant List, record kew-45953, and has not been changed.