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.

(35)50-150 cm tall, to 5 mm thick near the base, stiffly erect, not rooting at the lower nodes;

internodes glabrous.

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.

longer than the internodes, smooth or scabridulous, rounded dorsally, bases somewhat flat and chartaceous;

ligules 0.5-2(3) mm, firm, truncate, usually ciliolate;

blades 10-50 cm long, 1.5-6 mm wide, flat or involute, stiff, glabrous abaxially, scabrous adaxially.

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.

15-60 cm long, 0.5-1.2 cm wide, spikelike, dense, grayish-green, often interrupted below;

primary branches 0.2-4 cm, appressed;

pedicels 0.2-3 mm, hispidulous, strongly divergent.

1.7-3.1 mm, occasionally with 2 florets.

2.4-4 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, 1.8-3.2 mm, almost as long as the florets, scabrous to scabridulous, 1-veined, usually acute or obtuse, occasionally acuminate or notched, occasionally mucronate, mucros to 0.6 mm;

lemmas 2.4-4 mm, lanceolate, pubescent on the calluses, lower 1/6 of the margins, and midveins, hairs to 0.4 mm, apices scabrous, acute or obtuse, unawned, rarely mucronate, mucros to 1 mm;

paleas 2.3-3.8 mm, lanceolate, acute;

anthers 1.3-1.8 mm, yellow to purple.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.8-2.2 mm, fusiform, brownish.

= 40.

= 40.