This name is a synonym of Rhododendron mariesii Hemsl. & E.H. Wilson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12305078) with original publication details: J. Coll. Sci. Imp. Univ. Tokyo 30(1): 174–175 1911.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:333347-1.
This name was in version 1 of The Plant List, record tro-12305078, and has not been changed.