Flora of North America species comparison

30-120 cm;

nodes glabrous.

25-50 cm;

nodes pubescent.

glabrous;

ligules shorter than 1 mm, of hairs;

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

glabrous, margins ciliate distally;

ligules 1-2 mm, ciliate;

blades 7-15 cm long, 5-8 mm wide, flat, scabrous, abaxial surface conspicuously hispid over the veins with papillose-based hairs, adaxial surface sparsely hispid over the veins;

bristles solitary, 5-15 mm, flexible.

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.

5-12 cm, loosely spicate;

rachises scabrous.

2-2.8 mm, elliptical and turgid.

1.8-2 mm.

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.

about 1/3 as long as the spikelets, 3-veined, lateral veins coalescing with the central vein below the apices;

upper glumes about 2/3 as long as the upper lemmas, 5-veined, obtuse;

lower paleas equaling the lower lemmas, broad;

upper lemmas very strongly and coarsely transversely rugose;

upper paleas similar to the upper lemmas.

= 36, 72.

= unknown.