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 with 1-3 mm hairs.

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.

glabrous;

auricles 0.3-3 mm;

ligules 1-2 mm;

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

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.

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 mm, glabrous.

3-5 mm, sparsely and shortly pilose.

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

spikelets 6-8 mm long, 0.9-1.2 mm wide, brown.

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 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.

spikelets similar to the sessile spikelets.

= 80.

= 60.