This name is a synonym of Betula pubescens var. glabrata Wahlenb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 21650) with original publication details: Fl. Vosges ed. 2: 205 1887.
This name was in version 1 of The Plant List, record kew-21650.