Flora of North America species comparison

5-30 cm tall, 0.4-1 mm thick, decumbent, geniculate, or erect;

internodes usually nodulose (occasionally smooth) for most of their length, puberulent or nodulose below the nodes.

30-110 cm tall, 1-1.5 mm thick, stiffly erect, much branched above the middle, internodes mostly smooth, polished, glabrous or puberulent immediately below the nodes, elliptic in cross section and strongly keeled.

shorter or longer than the internodes, glabrous;

ligules 0.8-3 mm, membranous, acute to truncate, erose;

blades 0.4-6.5 cm long, 0.5-4.2 mm wide, flat or involute, straight or arcuate-spreading, glabrous abaxially, hirtellous adaxially.

scabridulous, slightly keeled;

ligules 0.6-1.5(1.7) mm, membranous, truncate, lacerate-ciliolate;

blades 2-17 cm long, 2-5 mm wide, flat, usually scabrous or scabridulous, occasionally smooth.

1-15 cm long, 0.1-1.7 cm wide, exserted, narrow or spikelike, rachises usually concealed by the branches;

primary branches 0.4-5 cm, usually closely appressed at maturity, rarely diverging up to 20° from the rachises;

pedicels 0.2-2 mm, setulose.

0.8-16 cm long, 0.3-1.8 cm wide, lobed, dense;

branches 0.2-2.5 cm, appressed;

pedicels absent or to 1 mm, strigose.

1.7-3.1 mm, occasionally with 2 florets.

3-8 mm.

subequal, 0.6-2 mm, 1/3– 1/2 as long as the lemmas, green, 1(2)-veined, acute, sometimes mucronate, mucros less than 0.2 mm;

lemmas 1.7-2.6(3.1) mm, lanceolate, dark greenish, plumbeous, or mottled, glabrous, apices scabridulous, acute to acuminate, sometimes mucronate, mucros to 0.5 mm;

paleas 1.2-2.4(2.9) mm, lanceolate, acute;

anthers 0.9-1.6 mm, yellow to purplish.

subequal, 3-8 mm (including the awns), about 1.3-2 times longer than the lemmas, smooth or scabridulous distally, 1-veined, acuminate and awned, awns to 5 mm;

lemmas 2.2-3.8 mm, lanceolate, pilose on the calluses, lower 1/2 of the midveins, and margins, hairs to 1.2 mm, apices scabridulous, acuminate, unawned or awned, awns to 1 mm;

paleas 2.2-3.8(4.5) mm, lanceolate, intercostal region loosely pilose on the lower 1/2, apices acuminate;

anthers 0.4-0.8 mm, yellowish.

0.9-1.6 mm, narrowly ellipsoid, brown.

(1.2)1.4-2.3 mm, fusiform, brown.

= 40.

= 40.