Flora of North America species comparison

3-6 m tall, 2-5 cm thick, clumped, glabrous throughout or nearly so, lower internodes swollen.

to 5 m, glabrous.

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.

to 2 m long, 3-25 mm wide, flat or channeled, glaucous and scabrous.

20-90 cm, compact;

primary branches 2-5 cm, considerably shorter than the supporting branches;

rame internodes hirsute, hairs to 7 mm.

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.

2-5 mm, glabrous.

shorter than the sessile spikelet.

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

spikelets 4-6 mm long, somewhat heteromorphic.;

sessile spikelets: callus hairs to 2.5 mm, white to gray;

glumes equal;

lower glumes membranous, pubescent;

upper glumes glabrous;

lower lemmas oblong-elliptic, pubescent;

upper lemmas oblong-elliptic, ciliate on the margins, acute to shortly awned;

awns about 1.3 mm, not visible beyond the glumes;

anthers 3.

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.

spikelets similar to the sessile spikelets.

spikelets pilose on the glumes, hairs 4-9 mm.

= 80.

= 20, 22, 40, 60.