Flora of North America species comparison

1-2.5 m;

nodes sericeous, hairs to 5 mm.

0.9-1.8 m;

nodes glabrous or with hairs to 0.5 mm.

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;

ligules 1-3 mm, with lateral lobes;

blades 18-60 cm long, 5-12 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.

30-40 cm, glabrous;

panicles 1-2.5 cm wide, linear;

lowest nodes glabrous or sparsely pilose;

rachises 10-35 cm, glabrous or sparsely pubescent;

primary branches 6-18 cm, appressed;

rame internodes 3-5 mm, glabrous.

2.5-5 mm, pilose.

3-5 mm, glabrous.

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

spikelets 7-10 mm long, 1.1-1.5 mm wide, brown.

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 absent or to 2 mm, shorter than the spikelets, straw-colored;

lower glumes scabrous, 5-veined;

lower lemmas 6-8 mm, 2-veined;

upper lemmas 0.9-1 times as long as the lower lemmas, 3-veined, entire;

awns 17-24 mm, terete, straight or curved at the base;

lodicule veins extending into hairlike projections;

anthers 2.

spikelets similar to the sessile spikelets, except frequently pilose.

spikelets similar to the sessile spikelets.

= 30, 60, 90.

= 30.