This name is a synonym of Rhododendron rupicola var. chryseum (Balf. f. & Kingdon-Ward) Philipson & M.N. Philipson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12304025) with original publication details: Notes Roy. Bot. Gard. Edinburgh 9(44–45): 219–220 1916.
This name was in version 1 of The Plant List, record tro-12304025, and has not been changed.