This name is a synonym of Aristida megapotamica Spreng..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 394971) with original publication details: Kongl. Svenska Vetensk. Acad. Handl. n.s., 34(6): 14 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:19290-2.
This name was in version 1 of The Plant List, record kew-394971.