Flora of North America species comparison

10-150 cm, erect, sometimes branching at the aerial nodes, glabrous, sometimes scabrous beneath the panicle;

nodes glabrous.

1-1.5 m, erect, sometimes branching above, pubescent beneath the panicle;

nodes glabrous.

green or glaucous;

sheaths glabrous or pubescent, margins ciliate;

ligules 0.5-3 mm, membranous, ciliate;

blades 3-50 cm long, 2-13 mm wide, flat, glabrous or pubescent, margins ciliate or glabrous basally.

burgundy (rarely green);

sheaths glabrous, margins ciliate;

ligules 0.5-0.8 mm;

blades 33-52 cm long, 6-11 mm wide, flat, antrorsely scabridulous, margins ciliate basally, midvein not noticeably thickened.

2-20 cm long, 4-35 mm wide, fully exerted from the sheaths, erect, green, brown, brown-purple, or dark purple;

rachises terete, scabrous.

23-32 cm long, 30-58 mm wide, fully exerted from the sheaths, flexible, drooping, burgundy (rarely pale or whitish-green);

rachises terete, pubescent.

2.5-5.6 mm, sessile, glabrous;

lower glumes 1-3 mm, 0-1-veined;

upper glumes 1.3-3.4 mm, about 1/2 as long as the spikelet, (0)1-3-veined;

lower florets staminate or sterile;

lower lemmas 2.5-5.3 mm, 3-7-veined;

lower paleas absent or 2.5-5 mm;

anthers absent or about 1.4 mm;

upper florets not disarticulating at maturity;

upper lemmas 2.2-5.4 mm, (3)5(6)-veined, margins glabrous;

anthers 1.4-2.7 mm.

5.3-6.5 mm;

pedicels 0.1-0.3 mm;

lower glumes 0.5-1 mm, veinless;

upper glumes 1.9-3.6 mm, 0-1-veined;

lower florets staminate;

lower lemmas 4.7-6.1 mm, 5(6)-veined;

lower paleas 4.5-5 mm;

anthers 2-2.5 mm;

upper florets not disarticulating at maturity;

upper lemmas 5.2-6.1 mm, 5-veined;

anthers 2.5-2.7 mm.

1.2-1.9 mm long, 0.4-1 mm wide, concealed by the lemma and palea at maturity.

concealed by the lemma and palea at maturity.

11-37 per cm, disarticulating at maturity;

fascicle axes 0.2-1.5 cm, with 1-12 spikelets;

outer bristles 16-89, 0.3-11.7 mm, many exceeding the spikelets;

inner bristles 7-20, 3.8-13.8 mm, fused to 1/4 of their length, flattened, grooved, ciliate;

primary bristles 10.5-23 mm, long-ciliate, noticeably longer than the other bristles.

10-17 per cm, disarticulating at maturity;

fascicle axes 1-2 mm, with 1-3 spikelets;

outer bristles 43-68, 1.2-18.5 mm, terete, scabrous;

inner bristles 4-10, 11.7-25 mm, long-ciliate;

primary bristles 21.3-33.6 mm, ciliate, noticeably longer than the other bristles.

= 36, 45.

= 54.