This name is a synonym of Rhododendron sanguineum var. cloiophorum (Balf. f. & Forrest) D.F. Chamb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060544) with original publication details: Sp. Rhodod. 545 1930.
This name was in version 1 of The Plant List, record tro-50060544, and has not been changed.