Flora of North America species comparison

1-2.5 m;

nodes sericeous, hairs to 5 mm.

to 5 m, glabrous.

glabrate or glabrous;

auricles absent;

ligules 2-6 mm;

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

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.

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.

2.5-5 mm, pilose.

shorter than the sessile spikelet.

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

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 (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.

spikelets similar to the sessile spikelets, except frequently pilose.

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

= 30, 60, 90.

= 20, 22, 40, 60.