This name is a synonym of Aristida scabrivalvis Hack..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 395132) with original publication details: Bol. Soc. Brot. II, 44: 287 1970.
This name was in version 1 of The Plant List, record kew-395132.