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 394684) with original publication details: Bot. Jahrb. Syst. 39: 599 1907.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:389460-1.
This name was in version 1 of The Plant List, record kew-394684, and has not been changed.