This name is a synonym of Rhododendron vernicosum Franch..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12304781) with original publication details: Notes Roy. Bot. Gard. Edinburgh 10(47–48): 103–104 1917.
This name was in version 1 of The Plant List, record tro-12304781.