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, glabrous;

nodes glabrous.

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.

glabrous;

auricles absent;

ligules 0.6-1.1 mm;

blades 50-100 cm long, 5-14 mm wide, glabrous.

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.

40-80 cm, glabrous;

panicles lanceolate;

rachises 30-70 cm, glabrous;

primary branches 6-20 cm, appressed or spreading;

rame internodes 1-2 mm, with hairs.

2-5 mm, glabrous.

1-3 mm, pubescent.

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

spikelets 4-6 mm long, 0.7-0.9 mm wide, straw-colored.

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 4-6 mm, subequal to the spikelets, white;

lower glumes smooth, 4-5-veined;

upper glumes 3-veined;

lower lemmas 3-5 mm, 1-veined;

upper lemmas subequal to the lower lemmas, without veins, entire;

awns 2-5 mm, flat, straight or curved at the base;

lodicule veins not extending into hairlike projections;

anthers 3.

spikelets similar to the sessile spikelets.

spikelets similar to the sessile spikelets.

= 80.

= 20.