Flora of North America species comparison

5-30 cm tall, 0.4-1 mm thick, decumbent, geniculate, or erect;

internodes usually nodulose (occasionally smooth) for most of their length, puberulent or nodulose below the nodes.

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

internodes glabrous.

shorter or longer than the internodes, glabrous;

ligules 0.8-3 mm, membranous, acute to truncate, erose;

blades 0.4-6.5 cm long, 0.5-4.2 mm wide, flat or involute, straight or arcuate-spreading, glabrous abaxially, hirtellous adaxially.

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.

1-15 cm long, 0.1-1.7 cm wide, exserted, narrow or spikelike, rachises usually concealed by the branches;

primary branches 0.4-5 cm, usually closely appressed at maturity, rarely diverging up to 20° from the rachises;

pedicels 0.2-2 mm, setulose.

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.

1.7-3.1 mm, occasionally with 2 florets.

3.5-7 mm, yellowish to pale greenish.

subequal, 0.6-2 mm, 1/3– 1/2 as long as the lemmas, green, 1(2)-veined, acute, sometimes mucronate, mucros less than 0.2 mm;

lemmas 1.7-2.6(3.1) mm, lanceolate, dark greenish, plumbeous, or mottled, glabrous, apices scabridulous, acute to acuminate, sometimes mucronate, mucros to 0.5 mm;

paleas 1.2-2.4(2.9) mm, lanceolate, acute;

anthers 0.9-1.6 mm, yellow to purplish.

(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.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.9-2 mm, fusiform, light brown.

= 40.

= unknown.