1	"Blades glaucous, glabrous, and smooth"	"Andropogon glomeratus var. glaucopsis"
1	"Blades green, often pubescent or scabrous"	2
2	"Sheaths subtending the inflorescence units 1.5-3 mm wide; leaf sheaths usually smooth; ligules ciliate, the cilia 0.2-0.9 mm long"	"Andropogon glomeratus var. pumilus"
2	"Sheaths subtending the inflorescence units (1.5)2.3-3.4(4.4) mm wide; leaf sheaths often scabrous; ligules, when ciliate, with the cilia no more than 0.5 mm long"	3
3	"Keels of the lower glumes scabrous below and beyond midlength"	"Andropogon glomeratus var. scabriglumis"
3	"Keels of the lower glumes usually smooth below midlength, scabrous distally"	4
4	"Upper portion of the plants oblong to obpyramidal; mature peduncles (4)11-35(60) mm long; anthers eventually falling"	"Andropogon glomeratus var. glomeratus"
4	"Upper portion of the plants cylindrical to oblong; mature peduncles 2-5(8) mm long; withered remnants of anthers retained within the spikelets"	"Andropogon glomeratus var. hirsutior"