Flora of North America species comparison

20-100 cm.

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

nodes glabrous or sparsely hispid.

compressed, glabrous, margins villous distally;

ligules 1-2.5 mm, ciliate;

blades 8-25 cm long, 2-5 mm wide, flat or folded, scabrous on both surfaces.

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.

6-15 cm, tightly spikelike, pale green;

rachises scabrous or villous;

bristles usually solitary, 4-15 mm, ascending.

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.

2.2-2.8(3) mm, elliptical.

about 2 mm, ovate-lanceolate.

about 1/2 as long as the spikelets, 3-veined;

upper glumes from 3/4 as long as to equaling the florets, 5-veined;

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas 1/2 - 3/4 as long as the upper paleas, lanceolate;

upper lemmas apiculate, finely and transversely rugose;

upper paleas similar.

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.

= 54, 68, 72.

= unknown.