This name is a synonym of Aristida torta (Nees) Kunth.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 404191) with original publication details: Fl. Bras. Enum. Pl. 2: 386 1829.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:395484-1.
This name was in version 1 of The Plant List, record kew-404191, and has not been changed.