Flora of North America species comparison

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

internodes mostly scabrous, scabrous or hispidulous below the nodes.

7-30 cm tall, 0.5-1 mm thick, erect to decumbent;

internodes mostly smooth to slightly nodulose, minutely pubescent or glabrous 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 or longer than the internodes, glabrous;

ligules 0.2-0.8 mm, membranous, truncate;

blades 0.5-4.7 cm long, 0.2-1.8 mm wide, usually involute, sometimes flat, often at right angles to the culm, glabrous 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.

1-5 cm long, 0.1-0.4 cm wide, contracted, usually partially included in the upper sheaths, rachises usually visible between the branches;

primary branches 0.2-1.2 cm, usually closely appressed at maturity, rarely diverging up to 30° from the rachises;

pedicels 0.1-1.1 mm, glabrous.

4-7.5 mm, borne singly.

1.4-2.4 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, 0.5-1.4 mm, 1/3 – 1/2 as long as the lemmas, yellowish to light green, glabrous, 1(2-3)-veined, acute, unawned;

lemmas 1.3-2.4 mm, lanceolate, green or purplish, glabrous or the calluses and margins appressed-pubescent, hairs shorter than 0.3 mm, apices acute, unawned;

paleas 1-2 mm, lanceolate, glabrous, acute;

anthers 0.7-1.4 mm, yellow to purplish.

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

0.7-1.2 mm, ellipsoid to ovoid, brown.

spikelets usually present in the axils of the lower leaves.

= unknown.

= 20.