Flora of North America species comparison

25-60 cm.

40-100 cm, erect, slender;

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 0.1-0.4 mm, of stiff hairs;

blades 15-40 cm long, 2-5 mm wide, those of the basal leaves involute, those of the cauline leaves flat, adaxial surfaces sparsely pilose basally.

2-6 cm, verticillate, green to purple;

rachises retrorsely rough hispid.

to 35 cm, nodding, slender, interrupted;

rachises scabridulous;

branches 5-20, erect, axes 0.4-3.2 cm, undulating, with 3-12 spikelets in 2 ranks, a single bristle present below the terminal spikelets;

bristles 3-6 mm.

1.5-2.2 mm.

1.8-2.2 mm, obovate, turgid.

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.

0.6-0.8 mm, about 1/3 as long as the spikelets, 3-veined;

upper glumes equaling the upper lemmas, 5-7-veined;

lower lemmas equaling the upper lemmas;

lower paleas absent;

upper lemmas finely and transversely rugose;

anthers 0.9-1.1 mm.

= 18.

= unknown.