Flora of North America species comparison

1-2 m.

40-100 cm, erect, slender;

nodes glabrous.

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.

mostly glabrous, margins ciliate distally;

ligules 0.1-0.4 mm, of stiff hairs;

blades 15-40 cm long, 2-5 mm wide, those of the basal leaves involute, those of the cauline leaves flat, adaxial surfaces sparsely pilose basally.

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 35 cm, nodding, slender, interrupted;

rachises scabridulous;

branches 5-20, erect, axes 0.4-3.2 cm, undulating, with 3-12 spikelets in 2 ranks, a single bristle present below the terminal spikelets;

bristles 3-6 mm.

3-4 mm, elliptic, acuminate.

1.8-2.2 mm, obovate, turgid.

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.

0.6-0.8 mm, about 1/3 as long as the spikelets, 3-veined;

upper glumes equaling the upper lemmas, 5-7-veined;

lower lemmas equaling the upper lemmas;

lower paleas absent;

upper lemmas finely and transversely rugose;

anthers 0.9-1.1 mm.

= 54.

= unknown.