Flora of North America species comparison

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

nodes glabrous.

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

nodes 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 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.

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

rachises pubescent.

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

rachises terete, scabrous.

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.

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.

1.2-1.9 mm long, 0.4-1 mm wide, 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.

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.

= 27.

= 36, 45.