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.

100-200 cm, nodes villous.

sparsely strigose or glabrous;

ligules about 2 mm, of hairs;

blades 40-60 cm long, 20-80 mm wide, strongly plicate, with scattered hairs on each surface.

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.

30-60 cm, lanceoloid;

branches 2-5 cm, stiff;

bristles solitary, usually present only below the terminal spikelet on each branch, occasionally below non-terminal spikelets, 1-1.5 cm.

3-4 mm, elliptic, acuminate.

3-3.5 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.

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

upper glumes 2/3 as long as the spikelets, 5-7-veined;

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas absent or reduced to a small scale;

upper lemmas about 3 mm, nearly smooth, shiny.

= 54.

= 54.