This name is a synonym of Plectranthus monostachyus subsp. lateriticola (A.Chev.) B.J.Pollard.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 192874) with original publication details: J. Bot. (Morot) 22: 121 1909.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:459166-1.
This name was in version 1 of The Plant List, record kew-192874.