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.

15-40(50) cm tall, 0.8-1.5 mm thick, erect or decumbent;

internodes glabrous or strigulose for most of their length, including below the nodes.

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.

usually shorter than the internodes, smooth or scabridulous, without necrotic spots, not becoming spirally coiled when old;

ligules 0.5-2.5 mm, membranous, obtuse to acute, without lateral lobes;

blades 3-10 mm long, 0.5-2 mm wide, flat or involute (occasionally folded), smooth or scabridulous abaxially, hirsute or scabridulous adaxially, without necrotic spots.

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.

2-12 cm long, 0.3-1.8 cm wide, contracted, interrupted below;

primary branches 0.5-4 cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base;

pedicels 0.1-1.5 mm, scabrous.

1.7-3.1 mm, occasionally with 2 florets.

2.5-4 mm, plump near the middle.

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)1.5-2.6 mm, exceeded by the florets, 1-veined, acute or acuminate, unawned or awned, awns to 1.4 mm;

lemmas 2-3.5 mm, elliptic, widest near the middle, appressed-pubescent on the lower 1/2 - 2/3 of the midveins and margins, hairs to 0.5 mm, apices scabridulous, acuminate, awned, awns 10-20(25) mm, flexuous;

paleas 2-3.5 mm, elliptic, intercostal region appressed-pubescent on the basal 1/2, apices acuminate;

anthers 1.5-2 mm, orange.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.5-2 mm, fusiform, brownish.

= 40.

= 20, 40.