This name is a synonym of Rhododendron impeditum Balf. f. & W.W. Sm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12303984) with original publication details: Sp. Rhodod. 411 1930.
This name was in version 1 of The Plant List, record tro-12303984, and has not been changed.