This name is a synonym of Rhododendron phaeochrysum var. agglutinatum (Balf. f. & Forrest) D.F. Chamb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12304824) with original publication details: Notes Roy. Bot. Gard. Edinburgh 11(52–53): 142–145 1919.
This name was in version 1 of The Plant List, record tro-12304824, and has not been changed.