This name is a synonym of Carpinus pubescens var. firmifolia (H.J.P.Winkl.) Hu.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 34464) with original publication details: Bot. Jahrb. Syst. 50(Suppl.): 505 1914.
This name was in version 1 of The Plant List, record kew-34464, and has not been changed.