This name is a synonym of Rhododendron lanatum Hook. f..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060444) with original publication details: Quart. Bull. Amer. Rhododendron Soc. 25: 143 1975.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:332437-1.
This name was in version 1 of The Plant List, record tro-50060444, and has not been changed.