Andropogon hallii Hackel. Phen: Aug-Nov. Hab: Sandy soils. Dist: ND and MT south to TX, NM, AZ, and Mexico; with eastward outliers likely representing introductions (as in IN, IL, MN, MO, and AR). The status of the species in MO is discussed by Braun (2019).
Origin/Endemic status: Native
Synonymy: = Ar, C, F, FNA25, Il, K3, K4, Tx; = Andropogon gerardii Vitman ssp. hallii (Hack.) Wipff – ETx1, NcTx; < Andropogon gerardii Vitman – Mex