Flora of North America species comparison

50-100 cm;

nodes usually glabrous.

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.

glabrous or finely pubescent, margins ciliate distally;

ligules of 1 mm hairs;

blades 15-20 cm long, 6-12 mm wide, flat or folded, often finely pubescent on both surfaces.

15-20 cm, loosely spikelike, interrupted, attenuate;

rachises often villous;

branches ascending, lower branches about 2.5 cm;

bristles usually solitary, less than 10 mm, antrorsely 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.

2-2.5 mm, ovate-lanceolate.

3-4 mm, elliptic, acuminate.

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

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

lower lemmas equaling the upper lemmas;

lower paleas as long as the upper paleas, broad;

upper lemmas finely and distinctly transversely rugose.

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.

= unknown.

= 54.