This name is a synonym of Avena sterilis subsp. atherantha (C. Presl) H. Scholz.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25544871) with original publication details: Bot. J. Linn. Soc. 76(4): 358 1978.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:881523-1.
This name was in version 1 of The Plant List, record tro-25544871, and has not been changed.