Flora of North America species comparison

30-100 cm;

nodes pubescent, hairs appressed.

30-70 cm, usually erect, branching profusely at the base;

nodes glabrous or sparsely hispid.

with ciliate margins;

ligules ciliate;

blades to 12(25) cm long, to 10(20) mm wide, flat, hispid on both surfaces.

keeled, sparsely pubescent, margins ciliate distally;

ligules to 1 mm, of hairs;

blades 15-30 cm long, usually less than 5 mm wide, densely pubescent on both surfaces.

3-18 cm, loosely spicate, interrupted, often purple;

rachises hispid;

bristles 1-3, 5-15 mm, flexible, antrorsely scabrous.

5-15 cm, slender, attenuate, interrupted, sparsely flowered;

rachises pubescent;

branches mostly shorter than 10 mm, villous;

bristles usually solitary, 4-7 mm, antrorsely scabrous.

1.5-2.2 mm.

about 2 mm, ovate-lanceolate.

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

upper glumes nearly equaling the upper lemmas, obtuse, 5-veined;

lower lemmas equaling the upper lemmas;

lower paleas about 1/3 as long as the lower lemmas, narrow;

upper lemmas finely and transversely rugose;

upper paleas similar to the upper lemmas.

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

upper glumes about 1/2 as long as the spikelets, 5-7-veined;

lower lemmas equaling the upper lemmas;

lower paleas equaling the upper paleas, broad;

upper lemmas finely and distinctly transversely rugose;

upper paleas similar to the upper lemmas.

= unknown.

= unknown.