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 12304124) with original publication details: Notes Roy. Bot. Gard. Edinburgh 12(57–58): 88–90 1920.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:331892-1.
This name was in version 1 of The Plant List, record tro-12304124, and has not been changed.