This name is a synonym of Aristida ramosissima Engelm. ex A.Gray.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 395094) with original publication details: Manual ed. 5 : 618 1867.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:19327-2.
This name was in version 1 of The Plant List, record kew-395094, and has not been changed.