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.

50-110 cm tall, 0.7-1.8 mm thick, ascending, geniculate, or decumbent, bushy and much branched above;

internodes smooth and shiny for most of their length, glabrous throughout.

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.

glabrous, margins hyaline;

ligules 0.7-1.7 mm, membranous, truncate, lacerate-ciliolate;

blades 4-18 cm long, 2-7 mm wide, flat, glabrous, smooth or scabridulous, those of the lateral branches similar to those of the primary culms.

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.

2-15 cm long, 0.3-2 cm wide, sometimes dense;

axillary panicles common, partly included in the sheaths;

primary branches 0.3-4.2 cm, ascending, appressed, occasionally diverging up to 30° from the rachises;

pedicels 0.4-5 mm, smooth or scabrous.

1.7-3.1 mm, occasionally with 2 florets.

2.2-4 mm, imbricate along the branches.

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, 2-4 mm, 3/4 as long as to longer than the lemmas, 1-veined, unawned or awned, awns to 2 mm;

upper glumes acuminate to acute;

lemmas 2.2-4 mm, narrowly lanceolate, hairy on the calluses, lower 1/3 of the midveins, and margins, hairs 0.3-0.8 mm, apices scabridulous, acuminate, unawned or awned, awns 0.1-13 mm;

paleas 2.3-4 mm, narrowly lanceolate, acuminate;

anthers 0.3-0.6 mm, usually yellow, occasionally purplish.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.6-1.9 mm, fusiform, brown.

= 40.

= 40.