Flora of North America species comparison

1-2 m. Sheaths strigose, margins with stiff hairs;

collars hispid;

ligules about 2 mm, of hairs;

blades to 50 cm long, 20-80 mm wide, plicate, tapering at both ends, abaxial surfaces sparsely strigose, adaxial surfaces short pubescent near the base.

30-100 cm;

nodes glabrous.

glabrous, margins ciliate distally;

ligules to 1 mm, densely ciliate;

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

to 40 cm, open;

branches 6-10 cm, loosely flexible, axes scabrous;

bristles solitary, usually present only below the terminal spikelet on each branch, occasionally below non-terminal spikelets, about 5 mm.

5-15 cm, tapering to the apices;

rachises retrorsely rough hispid;

bristles solitary, 4-7 mm, retrorsely scabrous.

3-4 mm, elliptic, acuminate.

2-2.3 mm.

1/2 as long as the spikelets, obtuse, 3-4-veined;

upper glumes nearly equaling the upper lemmas, 7-veined, acute;

lower lemmas exceeding the upper lemmas, 5-veined, apices involute;

lower paleas nearly equaling the lower lemmas in length and width;

upper lemmas obscurely transversely rugose, yellow, apiculate.

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.

= 54.

= 18, 36, 54, 72, 108.