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.

7-30 cm tall, 0.5-1 mm thick, erect to decumbent;

internodes mostly smooth to slightly nodulose, minutely pubescent or glabrous 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.

shorter or longer than the internodes, glabrous;

ligules 0.2-0.8 mm, membranous, truncate;

blades 0.5-4.7 cm long, 0.2-1.8 mm wide, usually involute, sometimes flat, often at right angles to the culm, glabrous abaxially, hirtellous 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.

1-5 cm long, 0.1-0.4 cm wide, contracted, usually partially included in the upper sheaths, rachises usually visible between the branches;

primary branches 0.2-1.2 cm, usually closely appressed at maturity, rarely diverging up to 30° from the rachises;

pedicels 0.1-1.1 mm, glabrous.

1.7-3.1 mm, occasionally with 2 florets.

1.4-2.4 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, 0.5-1.4 mm, 1/3 – 1/2 as long as the lemmas, yellowish to light green, glabrous, 1(2-3)-veined, acute, unawned;

lemmas 1.3-2.4 mm, lanceolate, green or purplish, glabrous or the calluses and margins appressed-pubescent, hairs shorter than 0.3 mm, apices acute, unawned;

paleas 1-2 mm, lanceolate, glabrous, acute;

anthers 0.7-1.4 mm, yellow to purplish.

0.9-1.6 mm, narrowly ellipsoid, brown.

0.7-1.2 mm, ellipsoid to ovoid, brown.

= 40.

= 20.