Flora of North America species comparison

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

internodes mostly scabrous, scabrous or hispidulous below the nodes.

40-120 cm, erect, not conspicuously branched;

internodes mostly smooth, sometimes scabridulous 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.

longer than the internodes, smooth or scabridulous, rounded towards the base, not becoming spirally coiled when old;

ligules 2-8 mm, firm below, membranous distally, obtuse to acute;

blades 15-50 cm long, 0.3-1.5 mm wide, flat to involute, smooth or scabridulous abaxially, 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.

15-50 cm long, 1-7 cm wide, loosely contracted, not dense;

primary branches 1-8 cm, appressed or diverging up to 30° from the rachises, naked basally;

pedicels 1.3-8 mm, hispidulous.

4-7.5 mm, borne singly.

3-4.2 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, 2-3 mm, exceeded by the florets, glabrous below, minutely pubescent or scabridulous distally, 1-veined, acuminate to acute, unawned or awned, awns to 1.6 mm;

lemmas 2.8-4.2 mm, narrow, lanceolate, calluses hairy, hairs to 1 mm, lemma bodies glabrous and smooth below, scabridulous distally, apices acuminate, awned, awns 8-40 mm, straight to flexuous, demarcation of the awns from the lemma bodies not evident;

paleas 2.8-4.2 mm, narrowly lanceolate, glabrous, acuminate;

anthers 1.4-2.2 mm, yellow.

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

2-2.2 mm, fusiform, brownish.

spikelets usually present in the axils of the lower leaves.

= unknown.

= unknown.