This name is a synonym of Rhododendron cyanocarpum (Franch.) Franch. ex W.W. Sm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060634) with original publication details: Sp. Rhodod. 738 1930.
This name was in version 1 of The Plant List, record tro-50060634.