This name is a synonym of Rhododendron platyphyllum (Franch. ex Diels) Balf. f. & W.W. Sm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50156649) with original publication details: Notes Roy. Bot. Gard. Edinburgh 37(2): 327 1979.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:880152-1.
This name was in version 1 of The Plant List, record tro-50156649.