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 12303912) with original publication details: Repert. Spec. Nov. Regni Veg. 13(368–369): 339–340 1914.
This name was in version 1 of The Plant List, record tro-12303912, and has not been changed.