Flora of North America species comparison

25-60 cm.

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

nodes glabrous or sparsely hispid.

glabrous throughout;

ligules 1-2 mm, of hairs, white;

blades usually less than 10 cm long, 5-10 mm wide, flat, broad basally, abaxial surfaces conspicuously strigose with papillose-based hairs, tapering abruptly at the apices;

bristles solitary, about 5 mm, retrorsely scabrous.

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.

2-6 cm, verticillate, green to purple;

rachises retrorsely rough hispid.

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.

1.5-2.2 mm.

about 2 mm, ovate-lanceolate.

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

upper glumes nearly as long as the spikelets, 5-7-veined;

lower lemmas equaling to slightly exceeding the upper lemmas;

lower paleas less than 1/2 as long as the spikelets, scalelike;

upper lemmas finely and 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.

= 18.

= unknown.