This name is a synonym of Aristida mendocina Phil..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 394757) with original publication details: Ark. Bot. 8(8): 37 1909.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:19223-2.
This name was in version 1 of The Plant List, record kew-394757, and has not been changed.