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 cm, erect;

internodes mostly glabrous, strigulose 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.

usually longer than the internodes, scabridulous or puberulent, keeled;

ligules 1.5-2.5 mm, membranous, acute, erose;

blades (1)2-5.5(8) cm long, 0.8-2 mm wide, usually involute, occasionally flat, scabridulous abaxially, villous 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.

14-24 cm long, 3-7 cm wide, narrowly pyramidal, open;

primary branches 2-7 cm, ascending, diverging less than 40° from the rachises;

pedicels 1-2(3) mm, usually shorter than the florets, appressed;

disarticulation above the glumes.

4-7.5 mm, borne singly.

1.7-3 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.

subequal, 1.3-1.8 mm, sparsely hirsute, 1-veined;

lower glumes 1.3-1.6 mm, acuminate, sometimes awned, awns to 0.5 mm;

upper glumes 1.4-1.8 mm, wider than the lower glumes, acuminate;

lemmas (1.7)1.9-2.5 mm, lanceolate, purplish or yellowish to light brownish, appressed-pubescent on the midveins and margins, hairs to 0.5 mm, apices awned, awns 1.2-3.5 mm, delicate;

paleas 1.8-2.4 mm, oblong-elliptic, glabrous;

anthers 0.4-0.6 mm, purplish.

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

1.3-2.3 mm, fusiform to dorsally compressed, light brownish.

spikelets usually present in the axils of the lower leaves.

= unknown.

= 40.