Flora of North America species comparison

25-85 cm tall, 0.9-1.7 mm thick, ascending;

internodes glabrous for most of their length, scabrous to strigose below the nodes.

(50)80-150 cm, stout, erect, not conspicuously branched;

internodes smooth for most of their length, smooth or scabridulous below the nodes.

scabridulous, especially basally;

ligules 0.5-1.5 mm, membranous, truncate, lacerate to ciliate;

blades 4-16 cm long, 2-4(5) mm wide, flat, scabrous abaxially, pubescent adaxially.

shorter or longer than the internodes, glabrous or puberulent, basal sheaths laterally compressed, usually keeled;

ligules 10-25 mm, membranous throughout, acuminate, lacerate;

blades 20-50 cm long, 2-6 mm wide, flat or folded, scabrous abaxially, smooth or scabridulous adaxially.

2-15 cm long, 0.5-2.8 cm wide, contracted, dense;

primary branches 0.5-5 cm, appressed to strongly ascending;

pedicels 0.5-1.5 mm, appressed, strigose.

20-45 cm long, 3-15 cm wide, loosely contracted to open, light purplish to light brownish;

primary branches 1-17 cm, lax, loosely appressed or diverging up to 70° from the rachises, naked basally;

pedicels 0.5-3 mm, smooth or scabridulous.

2-4 mm.

2.2-3.2 mm.

equal to subequal, 2-4 mm, subequal to or longer than the florets, 1-veined, veins scabridulous, apices acuminate to awn-tipped;

lemmas 2-3.5 mm, lanceolate, grayish-green, hairy on the calluses and lemma bases, hairs 2-3.5 mm, apices acuminate, awned, awns 1-10 mm;

paleas 2-3.5 mm, lanceolate, bases with silky hairs between the veins, apices acuminate;

anthers 0.4-1.5 mm, yellow.

subequal, 2.2-3.2 mm, exceeding the florets, scabridulous to scabrous, faintly 1-veined, acute to obtuse, usually unawned, occasionally awned, awns to 0.2 mm;

lemmas 2-3 mm, oblong-elliptic, shortly pubescent on the lower 1/2 - 3/4, apices acute, usually awned, sometimes unawned, awns to 15 mm, flexuous, purplish;

paleas 1.8-2.9 mm, oblong-elliptic, acute;

anthers 1.2-1.6 mm, yellowish to purplish.

0.9-1.1 mm, cylindrical, yellowish-brown.

1.3-1.6 mm, fusiform, reddish-brown.

= 20.

= 24, 26, 28, 40, 42, 46, 60, 64.