Plants densely cespitose, upper portion dense, obovate
to obpyramidal. Culms60-250 cm; internodes not glaucous. Sheaths
smooth; ligules 0.6-1 mm; blades 20-70 cm long, 2-7 mm wide, usually
glabrous or scabrous on the margins. Inflorescence units 50-500; subtending
sheaths 2.5-4.5 cm long, 2-3 mm wide; peduncles 20-70 mm, with 2(3)
rames; rames 2-4 cm, exserted at maturity; internodes filiform,
densely and evenly pubescent, hairs 3-9 mm. Sessile spikelets 3-4 mm;
unawned; callus hairs 0.5-1 mm; keels of lower glumes scabrous
above the midpoint; anthers 3, 1-1.4 mm. Pedicellate spikelets
mostly vestigial or absent, 1-2 of those in the terminal units on each rame
3-5 mm and staminate. 2n = 60, 120.
Andropogon bicornis is a widespread species of the Western Hemisphere
tropics. It was collected in the early 1960s in Dade County, Florida, near the
track of a major hurricane, but may not be established in the Flora region.