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 sericeous, hairs to 5 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.

glabrate or glabrous;

auricles absent;

ligules 2-6 mm;

blades usually 35-70 cm long, 8-30 mm wide, adaxial surfaces glabrous or pilose.

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, pilose;

panicles 6-15 cm wide, oblong or lanceolate;

rachises 15-30 cm, pilose;

lowest nodes densely pilose;

primary branches 2-13 cm, ascending or appressed to the rachises;

rame internodes 2-5.5 mm, pilose.

2-5 mm, glabrous.

2.5-5 mm, pilose.

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

spikelets 4.2-6 mm long, 0.8-1.1 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 (7)15-20(25) mm, longer than the spikelets, straw-colored or brown;

glumes usually glabrous;

lower glumes smooth, indistinctly 5-veined;

lower lemmas 3-5 mm, without veins;

upper lemmas 2.5-3.5 mm, 1-veined, entire;

awns 12-26 mm, straight or curved, terete basally;

lodicule veins sometimes extending into hairlike projections;

anthers 2.

spikelets similar to the sessile spikelets.

spikelets similar to the sessile spikelets, except frequently pilose.

= 80.

= 30, 60, 90.