Flora of North America species comparison

20-100 cm.

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

compressed, glabrous, margins villous distally;

ligules 1-2.5 mm, ciliate;

blades 8-25 cm long, 2-5 mm wide, flat or folded, scabrous on both surfaces.

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.

6-15 cm, tightly spikelike, pale green;

rachises scabrous or villous;

bristles usually solitary, 4-15 mm, ascending.

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.

2.2-2.8(3) mm, elliptical.

2-2.3 mm, subspherical.

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

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

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas 1/2 - 3/4 as long as the upper paleas, lanceolate;

upper lemmas apiculate, finely and transversely rugose;

upper paleas similar.

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.

= 54, 68, 72.

= 54.