This name is a synonym of Muhlenbergia glauca (Nees) Mez.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 437746) with original publication details: Linnaea 19: 689 1847.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:418414-1.
This name was in version 1 of The Plant List, record kew-437746, and has not been changed.