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 438060) with original publication details: Enum. Pl. 87 1809.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:418683-1.
This name was in version 1 of The Plant List, record kew-438060, and has not been changed.