Flora of North America species comparison

20-100 cm.

25-50 cm;

nodes pubescent.

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.

glabrous, margins ciliate distally;

ligules 1-2 mm, ciliate;

blades 7-15 cm long, 5-8 mm wide, flat, scabrous, abaxial surface conspicuously hispid over the veins with papillose-based hairs, adaxial surface sparsely hispid over the veins;

bristles solitary, 5-15 mm, flexible.

6-15 cm, tightly spikelike, pale green;

rachises scabrous or villous;

bristles usually solitary, 4-15 mm, ascending.

5-12 cm, loosely spicate;

rachises scabrous.

2.2-2.8(3) mm, elliptical.

1.8-2 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, 3-veined, lateral veins coalescing with the central vein below the apices;

upper glumes about 2/3 as long as the upper lemmas, 5-veined, obtuse;

lower paleas equaling the lower lemmas, broad;

upper lemmas very strongly and coarsely transversely rugose;

upper paleas similar to the upper lemmas.

= 54, 68, 72.

= unknown.