Flora of North America species comparison

30-120 cm tall, 0.8-2.5 mm thick, erect, seldom branched above the base;

internodes dull, mostly puberulent (sometimes sparsely so), terete, rarely keeled, strigose immediately below the nodes.

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.

scabridulous, slightly keeled;

ligules 0.2-0.6 mm, membranous, truncate, lacerate-ciliolate;

blades 2-15 cm long, 2-6 mm wide, flat, usually scabrous or scabridulous, occasionally smooth.

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.

1.5-12 cm long, 0.3-1.8 cm wide, lobed, dense;

primary branches 0.2-2.5 cm, appressed;

pedicels absent or to 1 mm, strigose.

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.

3-8 mm.

1.7-3.1 mm, occasionally with 2 florets.

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

lemmas 1.9-3.1 mm, lanceolate, pubescent on the calluses, mid-veins, and margins, hairs to 1.2 mm, apices scabridulous, acuminate, unawned or awned, awns to 1 mm;

paleas 1.9-3.1 mm, lanceolate, loosely pilose between the veins, apices acuminate;

anthers 0.8-1.5 mm, yellowish.

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.

1-1.6 mm, fusiform, brown.

0.9-1.6 mm, narrowly ellipsoid, brown.

= 20.

= 40.