Flora of North America species comparison

30-120 cm;

nodes glabrous.

40-100 cm, erect, slender;

nodes glabrous.

glabrous;

ligules shorter than 1 mm, of hairs;

blades to 25 cm long, 2-8 mm wide, flat, scabrous above.

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.

3-8 (10) cm, of uniform width throughout their length, densely spikelike;

rachises scabro-hispid;

bristles 4-12, 2-12 mm, antrorsely barbed, yellow to purple.

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.

2-2.8 mm, elliptical and turgid.

1.8-2.2 mm, obovate, turgid.

glumes about 1/3 as long as the spikelets, 3-veined;

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

lower florets often staminate;

lower lemmas occasionally indurate and faintly transversely rugose;

lower paleas equaling the lower lemmas;

upper lemmas distinctly transversely rugose, often purple-tipped.

glumes 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.

= 36, 72.

= unknown.