This name is a synonym of Rhododendron adenosum Davidian.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060168) with original publication details: Notes Roy. Bot. Gard. Edinburgh 21(3): 147 1953.
This name was in version 1 of The Plant List, record tro-50060168, and has not been changed.