Flora of North America species comparison

20-100 cm.

40-100 cm.

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.

villous distally, margins ciliate;

ligules about 1 mm, densely ciliate, hairs white;

blades 15-30 cm long, 5-8 mm wide, both surfaces villous.

6-15 cm, tightly spikelike, pale green;

rachises scabrous or villous;

bristles usually solitary, 4-15 mm, ascending.

10-20 cm, loosely spicate;

bristles usually solitary, 10-20 mm.

2.2-2.8(3) mm, elliptical.

2.8-3 mm.

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.

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

upper glumes nearly equaling the spikelets, 5-7-veined;

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas about 1/5 as long as the upper paleas, lanceolate;

upper lemmas finely and transversely undulate-rugose basally, striate and punctate distally;

upper paleas similar, ovate-lanceolate.

= 54, 68, 72.

= 54.