Flora of North America species comparison

10-40(50) cm, decumbent, usually all the nodes concealed by the sheaths;

internodes mostly scabrous or smooth, hispidulous below the nodes.

25-70 cm, erect, rounded near the base;

internodes glabrous.

glabrous, stiff, becoming flattened, ribbonlike or papery, and conspicuously spirally coiled when old;

ligules (6)10-20 mm, hyaline, acuminate, lacerate;

blades 7-25 cm long, 1-4 mm wide, flat to involute, scabrous abaxially, spiculate adaxially.

strongly basally concentrated, most blades not reaching more than 1/5 of the plant height;

sheaths shorter than the internodes, rounded, not keeled, scabridulous or smooth, not becoming spirally coiled when old;

ligules 2-5(7) mm, hyaline, acuminate, lacerate, often with lateral lobes;

blades 1-3(5) cm long, 0.3-0.9 mm wide, tightly involute or folded, arcuate, scabridulous, midveins and margins not thickened, green, apices somewhat sharp-pointed.

7-21 cm long, 3-15 cm wide, diffuse;

primary branches 1-8 cm, diverging 30-90° from the rachises, stiff, naked basally;

pedicels 1-8 mm, sometimes appressed to the branches.

8-25 cm long, 0.5-3 cm wide, not dense;

primary branches 0.6-8 cm, appressed or diverging up to 30° from the rachises;

pedicels 0.2-5 mm, scabrous.

2-3.5 mm.

3.5-7 mm, yellowish to pale greenish.

equal, 1.3-2.5 mm, scabridulous, 1-veined, apices acute to acuminate, minutely erose, unawned or awned, awns to 1.1 mm;

lemmas 2-3.2(3.5) mm, narrowly elliptic to lanceolate, appressed-pubescent on the basal 1/2 - 3/4 of the margins and midveins, apices scabrous, acuminate, awned, awns 0.5-4 mm;

paleas 2-3.2(3.5) mm, narrowly elliptic, intercostal region sparsely pubescent, apices acuminate;

anthers 1.2-2.1 mm, greenish.

(3)3.5-6(7) mm, scabridulous, unawned or awn-tipped;

lower glumes shorter than the upper glumes, 1-veined;

upper glumes equaling or exceeding the florets, 3-veined, acuminate to acute, occasionally 3-toothed, awned, awns to 1.5 mm;

lemmas 3.5-5.5(6) mm, lanceolate, pubescent on the lower 1/2 of the midveins and margins, hairs to 1 mm, apices scabrous, acuminate, awned, awns 12-27 mm, flexuous;

paleas 3.5-5.5 mm, lanceolate, pilose between the veins, apices scabridulous, acuminate;

anthers 2-3.5 mm, purple.

1.7-2 mm, fusiform, brownish.

1.9-2 mm, fusiform, light brown.

= 20, 21.

= unknown.