This name is a synonym of Rhododendron lutescens Franch..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12303913) with original publication details: Bull. Géogr. Bot. 24: 21 1915.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:332028-1.
This name was in version 1 of The Plant List, record tro-12303913, and has not been changed.