Flora of North America species comparison

50-200 cm.

to 100 cm;

nodes hispid, hairs appressed.

glabrous, fringed with white hairs;

ligules about 2 mm;

blades 15-30 cm long, 10-20 mm wide, usually with soft hairs on the adaxial surface.

glabrous or pilose, margins ciliate distally;

ligules about 1 mm, ciliate;

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

6-20 cm, densely spicate, arching and drooping from near the base;

rachises densely villous;

bristles (1)3(6), about 10 mm.

3-15 cm, densely spicate;

rachises rough hispid and sparsely villous;

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

2.5-3 mm.

about 2 mm, turgid.

about 1 mm, acute, 3-veined;

upper glumes about 2.2 mm, obtuse, 5-veined;

lower lemmas about 2.8 mm, obtuse;

lower paleas about 2/3 as long as the lower lemmas;

upper lemmas pale, finely and distinctly transversely rugose;

upper paleas similar to the upper lemmas.

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.

= 36.

= unknown.