This name is a synonym of Bromus commutatus subsp. neglectus (Parl.) P.M.Sm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 401741) with original publication details: Syn. Mitteleur. Fl. 2(1): 614 1901.
This name was in version 1 of The Plant List, record kew-401741.