This name is a synonym of Eragrostis pastoensis (Kunth) Trin..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25556802) with original publication details: Anales Mus. Nac. Buenos Aires 21: 138 1911.
This name was in version 1 of The Plant List, record tro-25556802.