Flora of North America species comparison

3-6 m tall, 2-5 cm thick, clumped, glabrous throughout or nearly so, lower internodes swollen.

1-2.5 m;

nodes hairy, occasionally glabrate, hairs 7-12 mm.

sometimes ciliate at the collar margins;

auricles present;

ligules 2-3 mm;

blades 70-150 cm long, 20-60 mm wide, usually glabrous, occasionally with hairs on the adaxial surfaces.

mostly glabrous, ciliate distally;

auricles absent;

ligules 1-3 mm;

blades 30-60 cm long, 14-28 mm wide, glabrous at maturity.

20-80 cm, glabrous;

panicles 50-100 cm long, to 20 cm wide, lanceolate;

rachises 30-80 cm, glabrous;

primary branches 10-25 cm, appressed to spreading;

rame internodes 3-6 mm, glabrous.

40-60 cm, pilose;

panicles 3-10 cm wide, oblong to lanceolate;

rachises 15-34 cm, densely pilose;

lowest nodes glabrous or sparsely pilose;

primary branches 3-12 cm, appressed;

rame internodes 3-5 mm, pilose.

2-5 mm, glabrous.

2.5-4 mm, pilose.

spikelets 3-5 mm long, 0.8-0.9 mm wide, white to gray.

spikelets 6-7 mm long, 1.1-1.4 mm wide, straw-colored;

callus hairs 9-14 mm, exceeding the spikelets, silvery or purple-tinged;

lower glumes 5-veined, smooth;

upper glumes 3-5-veined;

lower lemmas 4.8-5.6 mm, without veins or 1-veined;

upper lemmas 4-4.6 mm, 1-veined, bifid, teeth 1.8-2 mm, ciliate;

awns 14-20 mm, flattened and spirally coiled at the base;

lodicule veins not extending into hairlike projections;

anthers 2.

hairs 6-10 mm, exceeding the spikelets, white;

lower glumes glabrous, 2-4-veined;

upper glumes 3-veined;

lower lemmas 3-4.5 mm, 2-3-veined;

upper lemmas without veins, entire;

awns absent;

lodicule veins not extending into hairlike projections;

anthers 3.

spikelets similar to the sessile spikelets.

spikelets similar to the sessile spikelets, except frequently pilose.

= 80.

= 30.