This name is a synonym of Rhododendron xanthocodon Hutch..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50064379) with original publication details: Gard. Chron. 97: 374 1935.
This name was in version 1 of The Plant List, record tro-50064379, and has not been changed.