This name is a synonym of Muhlenbergia glomerata (Willd.) Trin..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 391422) with original publication details: Encycl. Suppl. 5: 495 1817.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:387096-1.
This name was in version 1 of The Plant List, record kew-391422, and has not been changed.