This name is a synonym of Aristida stipitata subsp. graciliflora (Pilg.) Melderis.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 395327) with original publication details: Meded. Rijks-Herb. 54C: 745 1933.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:389883-1.
This name was in version 1 of The Plant List, record kew-395327, and has not been changed.