This name is a synonym of Helictotrichon filifolium (Lag.) Henrard.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50122149) with original publication details: Carta Botanico 1: 8 1998.
This name was in version 1 of The Plant List, record tro-50122149, and has not been changed.