This name is a synonym of Plectranthus garckeanus (Vatke) J.K.Morton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45938) with original publication details: Linnaea 37: 323 1872.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:445999-1.
This name was in version 1 of The Plant List, record kew-45938, and has not been changed.