Plants cespitose, usually densely obpyramidal to oblanceolate above. Culms 70-210 cm; internodes occasionally somewhat glaucous just below the node; branches straight, mostly erect to ascending. Sheaths often scabrous, somteimes smooth; ligules 0.4-1.2 mm, ciliate, cilia 0.2-1.3 mm; blades 32-61 cm long, 2.9-5 mm wide, glabrous, rarely sparsely pubescent. Inflorescence units (9) 50-210 per culm; subtending sheaths (3) 4-5.9 (7) cm long, (1.5) 2-2.7 (3.6) mm wide; peduncles (10) 19-48 (93) mm, with 2 (4) rames; rames (2) 2.5-3.7 (4.5) cm, usually exserted at maturity, internodes evenly pubescent. Sessile spikelets (3.8) 4.4-4.8 (5.5) mm; callus hairs 1-3 mm; keels of lower glumes glabrous below midlength; awns 5-15 mm; anthers 1 (3), 1.3-2 mm, usually yellow (sometimes purple). Pedicellate spikelets vestigial or absent. 2n = 20.
Fla., Ala., Ga.
Andropogon floridanus grows on sandy soils in southeastern Georgia and Florida, being most abundant in Pinus clausa scrublands. It usually occurs in small stands, but stands of about a hundred individuals have been observed.
"decumbent" is not a number."elongated" is not a number.