Flora of North America species comparison

20-100 cm.

30-90 cm;

nodes glabrous, strigose, or with appressed hairs.

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.

with papillose-based hairs, sometimes nearly glabrous, margins ciliate distally;

ligules 1-2 mm, of stiff hairs;

blades 4-30 cm long, 1-7 mm wide, involute, stiff, scabridulous and narrowed basally.

6-15 cm, tightly spikelike, pale green;

rachises scabrous or villous;

bristles usually solitary, 4-15 mm, ascending.

5-20 cm, erect, slender, interrupted;

rachises scabrous;

bristles 2-8 mm.

2.2-2.8(3) mm, elliptical.

2.1-4.5 mm, elliptic to obovate, randomly distributed on the branch axes.

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.

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

upper glumes equaling the upper lemmas, 7-9-veined;

lower lemmas equaling the upper lemmas;

lower paleas absent;

upper lemmas indurate, finely and transversely rugose;

upper paleas similar to the upper lemmas.

= 54, 68, 72.