This name is a synonym of Rhododendron discolor Franch..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50055104) with original publication details: Acta Phytotax. Sin. 6(2): 170–171, pl. 41, f. 2 1957.
This name was in version 1 of The Plant List, record tro-50055104, and has not been changed.