This name is a synonym of Aristida laevis (Nees) Kunth.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 395232) with original publication details: Anales Mus. Nac. Montevideo 4(1): 77 1902.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:19355-2.
This name was in version 1 of The Plant List, record kew-395232, and has not been changed.