This name is a synonym of Aristida diffusa Trin..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 394447) with original publication details: Fl. Cap. 7: 557 1899.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:389289-1.
This name was in version 1 of The Plant List, record kew-394447.