Flora of North America species comparison

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

nodes glabrous.

5-100 cm, erect, sometimes branching, mostly glabrous but 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;

sheaths glabrous or pubescent, margins ciliate;

ligules 0.6-1.2 mm, membranous, ciliate;

blades 2-45 cm long, 2.5-7 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.

2-13.8 cm long, 4-11 mm wide, erect, green 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.

3.1-5.3 mm, sessile, glabrous;

lower glumes 1-2.5 mm, 0-1-veined;

upper glumes 1.5-3.4 mm, (0)1-3-veined, about 1/2 as long as the spikelet;

lower florets staminate or sterile;

upper florets not disarticulating at maturity;

lower lemmas 2.7-5.3 mm, 3-7-veined;

lower paleas absent or 2.5-4.5 mm;

anthers absent or 0.9-3 mm;

upper lemmas 2.8-5 mm, 3-5-veined;

anthers 3, 2-3.2 mm.

1.2-1.8 mm long, 0.4-1 mm wide.

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.

11-24 per cm, disarticulating at maturity;

fascicle axes 0.2-1.1 mm, with 1-12 spikelets;

outer bristles 10-62, 0.1-1.8 mm, not exceeding the spikelets;

inner bristles 6-32, 1.2-5 mm, ciliate, fused for 1/3 – 1/2 their length; flattened, grooved;

primary bristles 2.9-6.5 mm, ciliate, not noticeably longer than the other bristles.

= 27.

= 34, 36, 37, 54, 72.