Flora of North America species comparison

1-2.5 m;

nodes sericeous, hairs to 5 mm.

2-4 m, glabrous;

nodes glabrous.

glabrate or glabrous;

auricles absent;

ligules 2-6 mm;

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

glabrous;

auricles absent;

ligules 0.6-1.1 mm;

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

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.

2.5-5 mm, pilose.

1-3 mm, pubescent.

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

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

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 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, except frequently pilose.

spikelets similar to the sessile spikelets.

= 30, 60, 90.

= 20.