This name is a synonym of Calamagrostis tolucensis (Kunth) Trin. ex Steud..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397453) with original publication details: Enum. Pl. 1: 239 1833.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391410-1.
This name was in version 1 of The Plant List, record kew-397453.