This name is a synonym of Rhododendron zaleucum Balf. f. & W.W. Sm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12303828) with original publication details: Notes Roy. Bot. Gard. Edinburgh 12(57–58): 108–110 1920.
This name was in version 1 of The Plant List, record tro-12303828.