This name is a synonym of Plectranthus gracillimus (T.C.E.Fr.) Hutch. & Dandy.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45907) with original publication details: Ann. Soc. Sci. Bruxelles, Sér. B 49: 106 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:445967-1.
This name was in version 1 of The Plant List, record kew-45907.