This name is a synonym of Arctagrostis arundinacea (Trin.) Beal.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 437604) with original publication details: Repert. Spec. Nov. Regni Veg. 13: 161 1914.
This name was in version 1 of The Plant List, record kew-437604, and has not been changed.