Flora of North America species comparison

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

internodes mostly scabrous, scabrous or hispidulous below the nodes.

20-60 cm tall, 1-2 mm thick, erect, not rooting at the lower nodes;

internodes mostly glabrous or sparsely hispidulous, always 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.

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

ligules 0.2-0.8 mm, membranous, truncate;

blades 2-22 cm long, 0.5-2.7(3.5) mm wide, flat to folded, smooth or scabridulous abaxially, strigose 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.

4-14 cm long, 0.1-0.8 cm wide, spikelike, not dense;

primary branches 0.4-3 cm, appressed;

pedicels 0.1-1.2(4) mm.

4-7.5 mm, borne singly.

2.5-3.6 mm, dark green or plumbeous, occasionally with 2 florets.

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, 1.2-3 mm, about 3/4 as long as the spikelets, 1-veined, gradually acute to acuminate, occasionally mucronate, mucros to 0.3 mm;

lemmas 2.5-3.6 mm, lanceolate, sometimes mottled with greenish-black areas, with short, appressed hairs on the basal 1/2 - 3/4 of the midveins and margins, apices acuminate, sometimes mucronate, mucros to 0.6 mm;

paleas 2.4-3.6 mm, lanceolate, glabrous, acuminate;

anthers 1.2-1.8 mm, greenish.

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

1.6-2.3 mm, fusiform, brownish.

spikelets usually present in the axils of the lower leaves.

= unknown.

= 20.