This name is a synonym of Plectranthus lanuginosus (Hochst. ex Benth.) Agnew.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45959) with original publication details: Bot. Jahrb. Syst. 49: 487 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:446019-1.
This name was in version 1 of The Plant List, record kew-45959.