Flora of North America species comparison

1-2.5 m;

nodes sericeous, hairs to 5 mm.

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

glabrate or glabrous;

auricles absent;

ligules 2-6 mm;

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

usually glabrous;

ligules 1.5-3 mm;

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

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.

pilose;

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

primary branches 2.5-7 cm.

2.5-5 mm, pilose.

1.5-3 mm, ciliate.

spikelets 4.2-6 mm long, 0.8-1.1 mm wide, straw-colored.

spikelets 3.5-7 mm.

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.

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, except frequently pilose.

spikelets similar to the sessile spikelets.

= 30, 60, 90.

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