Flora of North America species comparison

50-200 cm.

to 6 m tall, 2-3 cm thick at the base.

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, smooth or scabrous, margins villous distally;

ligules 1-2 mm, ciliate;

blades to 60 cm long, to 3.5 cm wide, flat.

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

rachises densely villous;

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

to 50 cm long, to 5 cm wide, densely spikelike;

rachises densely villous;

bristles 1 or 2, 10-20 mm, flexible, antrorsely scabrous.

2.5-3 mm.

about 2 mm, disarticulating between the lower and upper florets.

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 as long as the spikelets, 3-veined;

upper glumes equaling the lower lemmas, 7-veined;

lower florets often staminate;

lower lemmas slightly exceeding the upper lemmas;

lower paleas equaling the lower lemmas, broad, hyaline, minutely pubescent over the veins;

upper lemmas smooth and shiny brown;

upper paleas similar to the upper lemmas.

= 36.

= 36.