This name is a synonym of Bouteloua curtipendula (Michx.) Torr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 395154) with original publication details: Syst. Veg. 2: 711 1817.
This name was in version 1 of The Plant List, record kew-395154.