Flora of North America species comparison

30-100 cm, erect;

nodes glabrous.

50-200 cm, erect, branching, smooth or scabrous beneath the panicle;

nodes shortly pubescent or glabrous.

glabrous, margins ciliate;

ligules 0.2-0.5 mm, membranous, ciliate;

blades (10)30-60 cm long, 2-8(12) mm wide, flat to folded, glabrous, margins ciliate basally.

green, sometimes glaucous;

sheaths glabrous, margins ciliate;

ligules 1-1.5 mm;

blades 34-44 cm long, 5-10 mm wide, flat, glabrous or pubescent, margins ciliate or glabrous basally.

all terminal, 6-20 cm long, 20-53 mm wide, fully exerted from the sheaths, erect, green to brown, deep purple, or stramineous to creamy-white;

rachises terete, with pubescent hairs.

all terminal, 8-17 cm long, 12-28 mm wide, erect, white;

rachises scabrous below, sometimes puberulent above.

5.5-8.4 mm, sessile or subsessile, glabrous;

pedicels to 0.1 mm;

lower glumes 0.2-1.4 mm, veinless;

upper glumes 2-4.9 mm, to 1/2 as long as the spikelet, 1-5-veined, acute to broadly acute;

lower florets sterile;

lower lemmas 4.9-8.1 mm, 7-9(10)-veined;

lower paleas absent;

upper lemmas 5.2-7.6 mm, 5-7-veined, acuminate;

anthers 3, 3-4.5 mm.

5.2-6.7 noticeably longer than the other bristles.;

spikelets 5.2-6.7 mm;

pedicels 0.1-0.5 mm;

lower glumes 0.9-1.8 mm, 0-1-veined;

upper glumes 2.6-4.2 mm, 1-5-veined;

lower florets staminate;

lower lemmas 5.1-6.4 mm, 5(6)-veined;

lower paleas 4.5-5.3 mm;

anthers 2.8-3.3 mm;

upper florets not disarticulating at maturity;

upper lemmas 5-5.8 mm, 5(6)-veined;

upper paleas with a bifid apex, teeth 0.1-0.2 mm;

anthers 2.6-3.2 mm.

concealed by the lemma and palea at maturity.

9-16 per cm;

fascicle axes 1.5-5.6 mm, with a stipelike base of 1-5.6 mm and 1(2) spikelet(s);

outer bristles 13-19, 0.8-15.6 mm;

inner bristles 7-10, 11.2-30 mm, scabrous;

primary bristles 26.7-35 mm, scabrous, usually not noticeably longer than the other bristles.

6-15 per cm;

fascicle axes 0.6-3.1 mm, with 1-6 spikelets;

outer bristles 20-60, 0.8-12.3 mm;

inner bristles 3-7, 5.5-16.5 mm, flattened, neither grooved nor fused, ciliate;

primary bristles 12.9-22.5 mm, ciliate, noticeably longer than the other bristles.

= 18.

= 18, 36, 45.