This name is a synonym of Aristida scribneriana Hitchc..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 394798) with original publication details: Contr. U. S. Natl. Herb. 17: 278 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:19234-2.
This name was in version 1 of The Plant List, record kew-394798, and has not been changed.