This name is a synonym of Rhododendron rufescens Franch..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50065026) with original publication details: Acta Horti Gothob. 1(6): 180–181 1924.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:332294-1.
This name was in version 1 of The Plant List, record tro-50065026, and has not been changed.