Flora of North America species comparison

1-3 m, often glaucous.

20-60 cm, wiry, glabrous.

glabrous or pilose;

ligules 0.4-2.5 mm;

blades 5-50 cm long, (2)5-10 mm wide, usually pilose adaxially, at least near the collar.

smooth;

ligules to 1.4 mm;

blades to 45 cm long, to 4 mm wide, involute and filiform, or folded.

usually only terminal;

peduncles with 2-6(10) rames;

rames 5-11 cm, exserted at maturity, usually purplish, sometimes yellowish;

internodes sparsely to densely pubescent, hairs 2.2-4.2 mm, usually white, rarely yellowish.

3-50+ per culm;

peduncles 2-13.2 cm, with 1 rame;

rames 2-4 cm, usually long-exserted at maturity;

internodes densely pubescent, hairs to 8 mm.

spikelets 5-11 mm, scabrous;

awns 8-25 mm;

anthers 3, 2.5-4.5 mm.

spikelets 4-6 mm;

lower glumes scabrous in the distal 1/2;

awns 11-20 mm.

spikelets 3.5-12 mm, usually well-developed and staminate.

spikelets reduced to an awned or unawned glume, sterile.

= 20, 40, 60 (usually), 70, 80.

= 40.