Flora of North America species comparison

30-100 cm, erect;

nodes glabrous.

50-200 cm, erect, pubescent beneath the panicle;

nodes pubescent.

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 or glaucous;

sheaths antrorsely scabridulous, mostly glabrous, margins ciliate;

ligules 1-1.7 mm;

blades 25-50 cm long, 3-9 mm wide, flat, antrorsely scabridulous, glabrous or pubescent, margins ciliate or glabrous basally, midvein not noticeably thickened.

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.

11.5-37.3 cm long, 35-50 mm wide, fully exerted from the sheaths, erect to slightly arching, white (sometimes purplish-tinged);

rachises terete, pubescent.

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.

5.6-6.7 mm;

pedicels 0.1-0.2 mm;

lower glumes 1-2.2 mm, veinless;

upper glumes 3.1-5.5 mm, 1-3-veined;

lower florets staminate;

lower lemmas 5.2-6.5 mm, 4-6-veined;

lower paleas 3.8-5 mm;

anthers 2.3-3 mm;

upper florets not disarticulating at maturity;

upper lemmas 5.2-6.2 mm, margins glabrous, 5-veined;

upper paleas bifid, teeth 0.3-0.8 mm;

anthers 1.9-2.9 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.

5-12 per cm;

fascicle axes 1-6 mm, with 1-10 spikelets;

outer bristles 0-24, 0.8-9.6 mm, terete, scabrous;

inner bristles 6-20, 5.6-17.5 mm, ciliate;

primary bristles 12.2-23.8 mm, ciliate, noticeably longer than the other bristles.

= 18.

= 18, 27, 36, 45, 54.