Flora of North America species comparison

50-200 cm.

30-70 cm, usually erect, branching profusely at the base;

nodes glabrous or sparsely hispid.

glabrous, fringed with white hairs;

ligules about 2 mm;

blades 15-30 cm long, 10-20 mm wide, usually with soft hairs on the adaxial surface.

keeled, sparsely pubescent, margins ciliate distally;

ligules to 1 mm, of hairs;

blades 15-30 cm long, usually less than 5 mm wide, densely pubescent on both surfaces.

6-20 cm, densely spicate, arching and drooping from near the base;

rachises densely villous;

bristles (1)3(6), about 10 mm.

5-15 cm, slender, attenuate, interrupted, sparsely flowered;

rachises pubescent;

branches mostly shorter than 10 mm, villous;

bristles usually solitary, 4-7 mm, antrorsely scabrous.

2.5-3 mm.

about 2 mm, ovate-lanceolate.

about 1 mm, acute, 3-veined;

upper glumes about 2.2 mm, obtuse, 5-veined;

lower lemmas about 2.8 mm, obtuse;

lower paleas about 2/3 as long as the lower lemmas;

upper lemmas pale, finely and distinctly transversely rugose;

upper paleas similar to the upper lemmas.

about 1/3 as long as the spikelets, 3-veined;

upper glumes about 1/2 as long as the spikelets, 5-7-veined;

lower lemmas equaling the upper lemmas;

lower paleas equaling the upper paleas, broad;

upper lemmas finely and distinctly transversely rugose;

upper paleas similar to the upper lemmas.

= 36.

= unknown.