This name is a synonym of Rhododendron griffithianum Wight.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060043) with original publication details: Icon. Pl. Asiat. pl. 523 1854.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:332984-1.
This name was in version 1 of The Plant List, record tro-50060043, and has not been changed.