Flora of North America species comparison

50-200 cm.

60-120 cm;

nodes pilose, with appressed hairs.

glabrous, fringed with white hairs;

ligules about 2 mm;

blades 15-30 cm long, 10-20 mm wide, usually with soft hairs on the adaxial surface.

glabrous or hispid;

ligules 1-2 mm, hispid;

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

6-20 cm, densely spicate, arching and drooping from near the base;

rachises densely villous;

bristles (1)3(6), about 10 mm.

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

rachises pubescent to villous;

lower branches to 3 cm;

bristles usually solitary, 10-35 mm, divergent.

2.5-3 mm.

2.2-2.5 mm, elliptical.

about 1 mm, acute, 3-veined;

upper glumes about 2.2 mm, obtuse, 5-veined;

lower lemmas about 2.8 mm, obtuse;

lower paleas about 2/3 as long as the lower lemmas;

upper lemmas pale, finely and distinctly 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.

= 36.

= 54.