Flora of North America species comparison

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

internodes mostly scabrous, scabrous or hispidulous below the nodes.

40-80 cm, stiffly erect from the base, not conspicuously branched;

internodes glabrous, sometimes puberulent 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.

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

ligules (2)4-7(9) mm, firmer near the base, obtuse, lacerate;

blades 8-35 cm long, 1-2 mm wide, flat or involute, filiform, glabrous abaxially, densely hirtellous adaxially.

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.

10-20(30) cm long, 4-15 cm wide, about as wide as long, loosely contracted to open but not diffuse;

primary branches 1.4-10 cm, capillary, diverging up to 80° from the rachises, scabridulous, naked basally, lower branches with 5-15(20) spikelets;

pedicels 3-25 mm, longer than the spikelets, capillary, stiff, or flexuous.

4-7.5 mm, borne singly.

3.5-5 mm, stramineous or brownish to purplish.

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.

subequal, 1-3 mm, shorter than the florets, hyaline, mostly sparsely hirtellous, apices glabrous, 1-veined (sometimes faintly so), acute, occasionally mucronate, mucros shorter than 0.7 mm;

lemmas 3.5-5 mm, narrowly lanceolate, calluses hairy, hairs to 0.5 mm, lemma bodies glabrous and smooth, apices scabridulous, acuminate, awned, awns 0.5-4(6) mm, clearly demarcated from the lemma bodies;

paleas 3.5-5 mm, narrowly lanceolate, mostly glabrous;

anthers 1.1-2 mm, yellowish to purplish.

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

2-2.4 mm, fusiform, brownish.

spikelets usually present in the axils of the lower leaves.

= unknown.

= 20.