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 50060122) with original publication details: Akad. Wiss. Wien, Math.-Naturwiss. Kl., Anz. 19: 3 1923.
This name was in version 1 of The Plant List, record tro-50060122.