Flora of North America species comparison

50-100 cm;

nodes usually glabrous.

to 100 cm;

nodes hispid, hairs appressed.

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 or pilose, margins ciliate distally;

ligules about 1 mm, ciliate;

blades 15-30 cm long, 4-7 mm wide, flat, scabrous or pubescent.

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.

3-15 cm, densely spicate;

rachises rough hispid and sparsely villous;

bristles 1-3, 5-15 mm, flexible, antrorsely scabrous.

2-2.5 mm, ovate-lanceolate.

about 2 mm, turgid.

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.

1/3 – 1/2 as long as the spikelets, 3-5-veined;

upper glumes about 3/4 as long as the upper lemmas, 5-7-veined;

lower lemmas equaling the upper lemmas;

lower paleas 3/4 as long as the lower lemmas, hyaline;

upper lemmas very coarsely and transversely rugose;

upper paleas similar to the upper lemmas.

= unknown.

= unknown.