This name is a synonym of Aristida longifolia Trin..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 395247) with original publication details: Bol. Soc. Venez. Ci. Nat. 15: 16 1953.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:389831-1.
This name was in version 1 of The Plant List, record kew-395247, and has not been changed.