This name is a synonym of Rhododendron sinogrande Balf. f. & W.W. Sm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12304975) with original publication details: Notes Roy. Bot. Gard. Edinburgh 15(72): 119–120 1926.
This name was in version 1 of The Plant List, record tro-12304975, and has not been changed.