Flora of North America species comparison

30-100 cm, erect;

nodes glabrous.

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

nodes glabrous.

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.

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.

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.

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

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.

5.3-6.5 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.

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.

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.

= 18.

= 54.