Flora of North America species comparison

40-150 cm, erect, pubescent beneath the panicle;

nodes glabrous.

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

nodes shortly pubescent or glabrous.

green, sometimes glaucous;

sheaths glabrous, margins ciliate;

ligules 0.5-1.1 mm;

blades 20-65 cm long, 2-3.5 mm wide, convolute or folded, scabrous, midvein noticeably thickened.

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.

(6)8-32 cm long, 40-52 mm wide, erect or arching, pink to dark burgundy;

rachises pubescent.

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

rachises scabrous below, sometimes puberulent above.

4.5-7 mm, sessile or pedicellate;

pedicels to 0.1 mm;

lower glumes absent or to 0.3 mm, veinless;

upper glumes 1.2-3.6 mm, (0)1-veined;

lower florets usually sterile, sometimes staminate;

lower lemmas 4-6 mm, 3-veined, acuminate, midvein excurrent to 0.7 mm;

lower paleas usually absent, if present, to 4.4 mm;

anthers absent or 2.3-2.4 mm;

upper lemmas 4.5-6.7 mm, attenuate, 5-veined, midvein excurrent to 0.7 mm, margins glabrous;

anthers 2.1-2.7 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.

8-10 per cm;

fascicle axes 2.3-4.5 mm, with 1-4 spikelets;

outer bristles 28-65, 0.9-19 mm;

inner bristles 8-16, 8-27 mm, ciliate;

primary bristles 26.5-34.3 mm, ciliate, 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.

= 27.

= 18, 36, 45.