Flora of North America species comparison

10-42 cm, erect or decumbent, much branched below;

internodes mostly scabrous, scabrous or hispidulous below the nodes.

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

internodes mostly scabrous or smooth, hispidulous below the nodes.

usually shorter than the internodes, flattened below, glabrous, scabridulous or smooth, striate;

ligules 1.5-3 mm, hyaline, acute, lacerate, with lateral lobes;

blades 1-5(7) cm long, 0.8-1.6(2) mm wide, flat or involute, scabrous abaxially, pubescent 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.

4-23 cm long, 0.5-2 cm wide, usually partially included in the subtending sheaths at maturity;

primary branches 20-45 mm, ascending, closely appressed;

pedicels 1-5 mm, appressed, scabrous;

disarticulation above the glumes.

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.

4-7.5 mm, borne singly.

2-3.5 mm.

1-2 mm, 1-veined, veins conspicuous, scabrous, and greenish basally, apices obtuse to subacute, often erose;

lemmas 4-6.2(7.5) mm, narrowly lanceolate, terete, mostly smooth, scabrous distally, hairy on the calluses and lower 1/4 of the margins, hairs 0.2-0.3 mm, whitish, lemma bodies not appearing 5-veined, apices acuminate, awned, awns 10-30 mm, straight, scabrous;

paleas 3.8-5.7(7) mm, narrowly lanceolate;

anthers 0.3-1.1 mm, purplish.

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.

1.6-3 mm, narrowly fusiform, brownish to pinkish.

1.7-2 mm, fusiform, brownish.

spikelets usually present in the axils of the lower leaves.

= unknown.

= 20, 21.