This name is a synonym of Plectranthus barbatus Andrews.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 136814) with original publication details: Nov. Pl. Sp. 268 1821.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:452867-1.
This name was in version 1 of The Plant List, record kew-136814.