Andropogon virginicus is native from the southeastern United States to northern South America, but has become established outide its native range in California, Hawaii, Japan, and Australia. Three varieties are recognized, two of which contain morphologically distinct variants. Andropogon virginicus hybridizes with A. glomeratus and A. longiberbis (Campbell 1986).
|1||Leaves bluish-green, more or less strongly glaucous||Andropogon virginicus var. glaucus|
|1||Leaves green, sometimes somewhat glaucous.||> 2|
|2||Sheaths subtending the inflorescence units (1.7)2.4-3.1(4) mm wide; inflorescences units usually with 2 rames; rames (1.3)1.5-2.3(3) cm long; peduncles (1) 4-9 (30) mm long||Andropogon virginicus var. decipiens|
|2||Sheaths subtending the inflorescences units (2.2)3.3-4.4(5.6) mm wide; inflorescence units with 2-5(7) rames; rames (0.5)1.9-3.3(4.4) cm long; peduncles (2)3-6(12) mm long||Andropogon virginicus var. virginicus|