Flora of North America species comparison

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

2-4 m tall, 0.6-2 cm thick, solitary or few together.

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.

usually glabrous;

ligules 1.5-3 mm;

blades 50-100 cm long, 10-25 mm wide, usually glabrous, markedly hirsute above the ligules.

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.

pilose;

panicles 40-70 cm, narrowly oblong to widely ovate, rachises 25-50 cm, densely pilose;

primary branches 2.5-7 cm.

2-5 mm, glabrous.

1.5-3 mm, ciliate.

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

spikelets 3.5-7 mm.

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.

hairs to 12 mm;

glumes glabrous over the back, ciliate toward the tip;

lower lemmas about 3 mm;

upper lemmas subequal to the lower lemmas, entire;

awns absent;

anthers 3.

spikelets similar to the sessile spikelets.

spikelets similar to the sessile spikelets.

= 80.

= 20, 24-30, 32, 36, 38, 40, 48-60, 64, 69.