This name is a synonym of Nassella mucronata (Kunth) R.W.Pohl.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 425875) with original publication details: Monogr. Comis. Invest. Ci. Prov. Buenos Aires 13: 72 1997.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:995379-1.
This name was in version 1 of The Plant List, record kew-425875.