Flora of North America species comparison

30-120 cm;

nodes glabrous.

30-70 cm, wiry, much branched distally.

glabrous;

ligules shorter than 1 mm, of hairs;

blades to 25 cm long, 2-8 mm wide, flat, scabrous above.

keeled, margins ciliate distally;

collars glabrate;

ligules to 1 mm, densely ciliate;

blades 5-15 cm long, 2-4 mm wide, flat, scabrous.

3-8 (10) cm, of uniform width throughout their length, densely spikelike;

rachises scabro-hispid;

bristles 4-12, 2-12 mm, antrorsely barbed, yellow to purple.

2-6 cm, spikelike, basal portion rarely lobed, tapering distally;

rachises scabrous to puberulent;

bristles solitary, 3-10 mm.

2-2.8 mm, elliptical and turgid.

1.9-2.1 mm.

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

upper glumes 1/2 - 2/3 as long as the spikelets, 5-veined;

lower florets often staminate;

lower lemmas occasionally indurate and faintly transversely rugose;

lower paleas equaling the lower lemmas;

upper lemmas distinctly transversely rugose, often purple-tipped.

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

upper glumes about 3/4 as long as the spikelets, 5-veined;

lower lemmas nearly equaling the upper lemmas, 5-veined;

lower paleas rudimentary to 1/2 as long as the upper paleas;

upper lemmas finely and transversely rugose;

upper paleas narrow.

= 36, 72.

= 36.