This name is a synonym of Aristida oligantha Michx..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 394978) with original publication details: Proc. Acad. Nat. Sci. Philadelphia 14: 92 1862 publ. 1863.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:389663-1.
This name was in version 1 of The Plant List, record kew-394978, and has not been changed.