Flora of North America species comparison

1-2 m.

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

strigose, margins with stiff hairs;

collars hispid;

ligules about 2 mm, of hairs;

blades to 50 cm long, 20-80 mm wide, plicate, tapering at both ends, abaxial surfaces sparsely strigose, adaxial surfaces short pubescent near the base.

glabrous, smooth or scabrous, margins villous distally;

ligules 1-2 mm, ciliate;

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

to 40 cm, open;

branches 6-10 cm, loosely flexible, axes scabrous;

bristles solitary, usually present only below the terminal spikelet on each branch, occasionally below non-terminal spikelets, about 5 mm.

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

rachises densely villous;

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

3-4 mm, elliptic, acuminate.

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

1/2 as long as the spikelets, obtuse, 3-4-veined;

upper glumes nearly equaling the upper lemmas, 7-veined, acute;

lower lemmas exceeding the upper lemmas, 5-veined, apices involute;

lower paleas nearly equaling the lower lemmas in length and width;

upper lemmas obscurely transversely rugose, yellow, apiculate.

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.

= 54.

= 36.