Flora of North America species comparison

25-60 cm.

30-100 cm;

nodes glabrous.

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.

mostly glabrous, margins ciliate distally;

ligules 1-2 mm, of hairs;

blades 5-15 mm wide, flat, abaxial surfaces scabrous, adaxial surfaces sparsely villous.

2-6 cm, verticillate, green to purple;

rachises retrorsely rough hispid.

5-15 cm, tapering to the apices, branches verticillate;

rachises antrorsely rough hispid, without villous hairs;

bristles solitary, 4-7 mm, antrorsely or retrorsely scabrous.

1.5-2.2 mm.

2-2.3 mm.

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, obtuse, 1(3)-veined;

upper glumes nearly as long as the spikelets;

lower paleas about 1/2 as long as the spikelets, broad;

upper lemmas finely and transversely rugose;

upper paleas similar to the upper lemmas.

= 18.

= 36.