This name is a synonym of Rhododendron stamineum Franch..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12305058) with original publication details: J. Linn. Soc., Bot. 26(173): 19 1889.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:331980-1.
This name was in version 1 of The Plant List, record tro-12305058.