This name is a synonym of Muhlenbergia torreyi (Kunth) Hitchc. ex Bush.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 437749) with original publication details: Amer. Midl. Naturalist 7: 33 1921.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:204653-2.
This name was in version 1 of The Plant List, record kew-437749, and has not been changed.