This name is a synonym of Rhododendron calvescens var. duseimatum (Balf. f. & Forrest) D.F. Chamb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50060151) with original publication details: Rhododendron Year Book 6: 152 1952.
This name was in version 1 of The Plant List, record tro-50060151, and has not been changed.