This name is a synonym of Eragrostis retinens Hack. & Arechav..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 413126) with original publication details: Notas Mus. La Plata, Bot. 2: 6 1937.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:93207-2.
This name was in version 1 of The Plant List, record kew-413126, and has not been changed.