Flora of North America species comparison

80-150 cm tall, 2-3 mm thick below, few together or solitary;

nodes finely pubescent.

40-80(150) cm.

mostly glabrous, pilose near the summits;

ligules 2-3 mm, rounded;

blades well-developed only on the cauline sheaths, 8-35 cm long, 6-25 mm wide, adaxial surfaces densely pilose basally.

more or less keeled, with scattered hairs, particularly below the collar;

ligules 2-3.5 mm, obtuse, lacerate and shortly pubescent;

blades 20-60 cm long, 4-10 mm wide, stiff, flat or folded, abaxial surfaces with scattered fine hairs, adaxial surfaces glabrous.

long-exserted, loose, with 2-5 erect to suberect branches;

branches 7-15 cm, densely pilose, with white or purplish-white hairs.

10-20 cm, flabellate, golden brown, with more than 15 branches;

rachises about 1/2 as long as the panicles;

branches 3.5-10.5 cm, ascending.

6-8 mm;

callus hairs from 1/2 as long as to equaling the spikelets, silky, white.

2-2.8 mm;

callus hairs 3-4 times longer than the spikelets, golden brown.

6-8 mm, sparsely pilose, 2-keeled above, 2-toothed, teeth densely white-ciliate;

upper glumes equaling the lower glumes, 3-5-veined;

awns of upper lemmas (4)8-15 mm, twisted at the bases;

anthers 2.5-3 mm.

hairy on the lower margins, hairs to 3 times longer than the glumes;

awns of upper lemmas 9-13 mm, exceeding the glumes, flexuous to weakly geniculate.

pedicels 1.5-2 mm;

longer pedicels 5-6 mm, sulcate on 1 side.

pedicels 1.5-2 mm;

longer pedicels 2.5-3.5 mm.

= 38.

= 40.