Flora of North America species comparison

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

internodes mostly scabrous, scabrous or hispidulous below the nodes.

50-110 cm tall, 0.7-1.8 mm thick, ascending, geniculate, or decumbent, bushy and much branched above;

internodes smooth and shiny for most of their length, glabrous throughout.

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.

glabrous, margins hyaline;

ligules 0.7-1.7 mm, membranous, truncate, lacerate-ciliolate;

blades 4-18 cm long, 2-7 mm wide, flat, glabrous, smooth or scabridulous, those of the lateral branches similar to those of the primary culms.

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.

2-15 cm long, 0.3-2 cm wide, sometimes dense;

axillary panicles common, partly included in the sheaths;

primary branches 0.3-4.2 cm, ascending, appressed, occasionally diverging up to 30° from the rachises;

pedicels 0.4-5 mm, smooth or scabrous.

4-7.5 mm, borne singly.

2.2-4 mm, imbricate along the branches.

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, 2-4 mm, 3/4 as long as to longer than the lemmas, 1-veined, unawned or awned, awns to 2 mm;

upper glumes acuminate to acute;

lemmas 2.2-4 mm, narrowly lanceolate, hairy on the calluses, lower 1/3 of the midveins, and margins, hairs 0.3-0.8 mm, apices scabridulous, acuminate, unawned or awned, awns 0.1-13 mm;

paleas 2.3-4 mm, narrowly lanceolate, acuminate;

anthers 0.3-0.6 mm, usually yellow, occasionally purplish.

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

1.6-1.9 mm, fusiform, brown.

spikelets usually present in the axils of the lower leaves.

= unknown.

= 40.