This name is a synonym of Aristida barbicollis Trin. & Rupr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 394518) with original publication details: Bothalia 8: 173 1964.
This name was in version 1 of The Plant List, record kew-394518, and has not been changed.