Flora of North America species comparison

50-100 cm;

nodes usually glabrous.

25-50 cm;

nodes pubescent.

glabrous or finely pubescent, margins ciliate distally;

ligules of 1 mm hairs;

blades 15-20 cm long, 6-12 mm wide, flat or folded, often finely pubescent 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.

15-20 cm, loosely spikelike, interrupted, attenuate;

rachises often villous;

branches ascending, lower branches about 2.5 cm;

bristles usually solitary, less than 10 mm, antrorsely scabrous.

5-12 cm, loosely spicate;

rachises scabrous.

2-2.5 mm, ovate-lanceolate.

1.8-2 mm.

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

upper glumes about 2/3 as long as the spikelets, 5-7-veined;

lower lemmas equaling the upper lemmas;

lower paleas as long as the upper paleas, broad;

upper lemmas finely and distinctly transversely rugose.

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.

= unknown.

= unknown.