This name is a synonym of Rhododendron phaeochrysum Balf. f. & W.W. Sm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060346) with original publication details: Acta Horti Gothob. 26(6): 117–121, f. 1 1963.
This name was in version 1 of The Plant List, record tro-50060346.