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.

(3)5-20(35) cm, erect or geniculate, often 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.

shorter or longer than the internodes, glabrous, smooth or scabridulous;

ligules 1-3.5 mm, hyaline to membranous, rounded to acute;

blades 1-4(6) cm long, 0.6-1.6 mm wide, flat or involute, smooth or scabridulous abaxially, scabrous or pubescent 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.

1.6-6 cm long, 0.2-0.5 cm wide, spikelike, interrupted near the base, long-exserted;

primary branches 0.9-1.2 cm, closely appressed at maturity;

pedicels 1-3 mm, scabrous.

1.7-3.1 mm, occasionally with 2 florets.

1.5-3.2 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.

greenish-gray, glabrous, 1-veined, rounded to subacute;

lower glumes 0.6-1.4 mm;

upper glumes 0.7-1.7 mm;

lemmas (1.5)1.8-2.5(3.2) mm, lanceolate, dark greenish, appressed-pubescent on the margins and midveins, hairs shorter than 0.3 mm, apices scabridulous, acute to acuminate, unawned, sometimes mucronate, mucros shorter than 1 mm;

paleas 1.6-2.6(3.1) mm, lanceolate, scabridulous distally;

anthers 0.5-1.2 mm, purplish.

0.9-1.6 mm, narrowly ellipsoid, brown.

0.9-1.5 mm, fusiform, reddish-brown.

= 40.

= 18.