This name is a synonym of Rhododendron siderophyllum Franch..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12303839) with original publication details: Repert. Spec. Nov. Regni Veg. 12(312–316): 103 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:332757-1.
This name was in version 1 of The Plant List, record tro-12303839, and has not been changed.