Flora of North America species comparison

1-2.5 m;

nodes sericeous, hairs to 5 mm.

1-2.5 m;

nodes with 1-3 mm hairs.

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 0.3-3 mm;

ligules 1-2 mm;

blades 15-40 cm long, 7-12 mm wide.

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.

35-45 cm, glabrous;

panicles 3-7 cm wide, linear to oblong;

rachises 13-35 cm, glabrous or sparsely pilose;

primary branches 5-12 cm, appressed;

rame internodes 3-6 mm, with hairs.

2.5-5 mm, pilose.

3-5 mm, sparsely and shortly pilose.

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

spikelets 6-8 mm long, 0.9-1.2 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 3-5 mm, from shorter than to equaling the spikelets, white or straw-colored;

lower glumes smooth or scabrous, 5-veined;

lower lemmas 5.8-7.5 mm, usually 3-veined;

upper lemmas 4-5.5 mm, 0.7-0.8 times as long as the lower lemmas, 3-veined, entire;

awns 16-26 mm, terete and straight to curving basally;

lodicule veins extending into hairlike projections to 0.6 mm long;

anthers 2.

spikelets similar to the sessile spikelets, except frequently pilose.

spikelets similar to the sessile spikelets.

= 30, 60, 90.

= 60.