Flora of North America species comparison

30-120 cm;

nodes glabrous.

50-150 cm, flattened;

nodes glabrous.

glabrous;

ligules shorter than 1 mm, of hairs;

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

glabrous;

blades 15-50 cm long, 4-10 mm wide, flat, rather lax.

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.

5-25 cm long, 4-8 mm thick (excluding the bristles), densely spicate;

bristles 5 or more, 3-6 mm, usually orange to purple.

2-2.8 mm, elliptical and turgid.

2.5-3 mm, elliptic-oblong.

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 as long as the spikelets;

upper florets staminate;

upper glumes Vi-A as long as the spikelets;

lower lemmas equaling the upper lemmas;

lower paleas equaling the upper paleas, broad;

upper lemmas finely and transversely rugose;

upper paleas similar to the upper lemmas.

= 36, 72.

= 36, 54.