This name is a synonym of Rhododendron selense subsp. jucundum (Balf. f. & W.W. Sm.) D.F. Chamb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12304870) with original publication details: Notes Roy. Bot. Gard. Edinburgh 9(44–45): 242–243 1916.
This name was in version 1 of The Plant List, record tro-12304870, and has not been changed.