Flora of North America species comparison

0.8-2.5 m;

nodes glabrous or pubescent.

1-2.5 m;

nodes with 1-3 mm hairs.

not ciliate;

auricles absent;

ligules 1-2 mm;

blades usually 40-60 cm long, 7-25 mm wide, glabrous.

glabrous;

auricles 0.3-3 mm;

ligules 1-2 mm;

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

45-75 cm, usually glabrous, occasionally pubescent or minutely pilose;

panicles 3-10 cm wide, linear or oblong;

rachises (10)30-50 cm, glabrous or sparsely pilose;

lowest nodes glabrous or sparsely pilose;

primary branches 7-14 cm, appressed;

rame internodes 4-6 mm, with hairs.

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.

3-4 mm, with hairs.

3-5 mm, sparsely and shortly pilose.

spikelets 6.5-10.5 mm long, 1.2-1.5 mm wide, purple or straw-colored.

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

hairs 3-7 mm, from shorter than to equaling the spikelets, white to straw-colored or brown;

lower glumes 5-veined, smooth basally, scabrous distally;

lower lemmas 5.5-8 mm, not or indistinctly veined, initially entire, sometimes becoming bifid, teeth 2-2.5 mm;

upper lemmas 5.5-8 mm, 0.9-1 times as long as the lower lemmas, 3-veined, entire or bifid;

awns 10-22 mm, always flattened below, sometimes spirally coiled;

lodicule veins sometimes extending as 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.

spikelets similar to the sessile spikelets.

= 60.

= 60.