Flora of North America species comparison

1-2.5 m;

nodes sericeous, hairs to 5 mm.

0.8-2.5 m;

nodes glabrous or pubescent.

glabrate or glabrous;

auricles absent;

ligules 2-6 mm;

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

not ciliate;

auricles absent;

ligules 1-2 mm;

blades usually 40-60 cm long, 7-25 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.

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.

2.5-5 mm, pilose.

3-4 mm, with hairs.

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

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

spikelets similar to the sessile spikelets, except frequently pilose.

spikelets similar to the sessile spikelets.

= 30, 60, 90.

= 60.