This name is a synonym of Plectranthus chiangdaoensis Suddee.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 45874) with original publication details: Acta Phytotax. Geobot. 24: 105 1970.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:445932-1.
This name was in version 1 of The Plant List, record kew-45874, and has not been changed.