Flora of North America species comparison

30-100 cm;

nodes pubescent, hairs appressed.

60-120 cm;

nodes pilose, with appressed hairs.

with ciliate margins;

ligules ciliate;

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

glabrous or hispid;

ligules 1-2 mm, hispid;

blades 15-30 cm long, 6-15 mm wide, flat or folded, scabrous, often pubescent.

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

rachises hispid;

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

15-25 cm, open, tapering from the base;

rachises pubescent to villous;

lower branches to 3 cm;

bristles usually solitary, 10-35 mm, divergent.

1.5-2.2 mm.

2.2-2.5 mm, elliptical.

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

upper glumes from 3/4 as long as to equaling the upper florets, 5-veined;

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas about 1/2 as long as the upper paleas, lanceolate;

upper lemmas finely cross-wrinkled, shortly apiculate;

upper paleas ovate-lanceolate.

= unknown.

= 54.