This name is a synonym of Arrhenatherum longifolium (Thore) Dulac.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 438253) with original publication details: Bull. Soc. Bot. France 68: 401 1922.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:418816-1.
This name was in version 1 of The Plant List, record kew-438253.