This name is a synonym of Rhododendron mariae Hance.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060825) with original publication details: Survey of Genus Rhododendron in S. China 53, 104, f. 5 1983.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:902901-1.
This name was in version 1 of The Plant List, record tro-50060825.