This name is a synonym of Rhododendron nivale subsp. boreale Philipson & M.N. Philipson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12304008) with original publication details: Pl. Wilson. 1(3): 506–507 1913.
This name was in version 1 of The Plant List, record tro-12304008, and has not been changed.