This name is a synonym of Plectranthus decurrens (Gürke) J.K.Morton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45917) with original publication details: Fl. Trop. Afr. 5: 427 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:445977-1.
This name was in version 1 of The Plant List, record kew-45917.