Flora of North America species comparison

50-200 cm.

60-120 cm, rarely branched distally, scabrous below the nodes and panicles.

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.

keeled, glabrous, usually with a few white hairs at the throat;

ligules 2-4 mm, densely ciliate;

blades 15-20 cm long, 7-15 mm wide, flat, adaxial surface scabrous.

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

rachises densely villous;

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

10-30 cm long, 1-2 cm wide, uniformly thick from the base to the apex, dense, rarely lobed basally;

rachises scabrous and loosely pilose;

bristles usually solitary, 10-20 mm, soft, antrorsely scabrous.

2.5-3 mm.

2-2.3 mm, subspherical.

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.

1/3 – 1/2 as long as the spikelets, 3-5-veined;

upper glumes about 3/4 as long as the spikelets, 5-7-veined;

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas nearly equaling the upper paleas in length and width;

upper lemmas transversely rugose;

upper paleas convex, ovate.

= 36.

= 54.