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.

5-42 cm tall, 0.5-1 mm thick, decumbent near the base, forming dense mats;

internodes glabrous, slightly nodulose.

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;

ligules 0.1-1(1.8) mm, membranous, truncate, occasionally lacerate;

blades 0.4-6 cm long, 0.5-1.4 mm wide, involute, glabrous, smooth or scabridulous 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.

1-9 cm long, 0.1-0.6 cm wide, contracted, not dense, usually partially included in the upper leaf sheaths;

primary branches 0.2-3 cm, usually closely appressed at maturity, rarely diverging up to 40° from the rachises;

pedicels 0.2-3.6 mm, setulose.

1.7-3.1 mm, occasionally with 2 florets.

2.6-4.2 mm, occasionally with 2 florets.

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, 1.1-3.6 mm, from 1/2 as long as to equaling the lemmas, light green, 1(2-3)-veined, acute, unawned;

lemmas 2.6-3.2(4.2) mm, lanceolate, dark greenish or mottled, glabrous or the calluses and margins appressed-pubescent, hairs to 0.3 mm, apices scabridulous, attenuate, usually mucronate, mucros 0.1-0.3 mm;

paleas 2.1-3.3 mm, lanceolate, smooth or scabridulous, acute;

anthers 0.7-1.4 mm, yellow to purplish.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.1-1.5 mm, ellipsoid to ovoid, brownish.

= 40.

= 60, 70-72.