This name is a synonym of Arrhenatherum album (Vahl) Clayton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397297) with original publication details: Symb. Bot. 2: 24 1791.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391289-1.
This name was in version 1 of The Plant List, record kew-397297.