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.

25-80 cm, erect, wiry;

internodes mostly glabrous, strigose or glabrous 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.

scabridulous, not becoming spirally coiled when old;

ligules 1-3 mm, membranous, acuminate, deeply lacerate;

blades 2-12 cm long, 1-3 mm wide, flat to involute, scabridulous abaxially, hirtellous or scabrous 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.

4-18(20) cm long, 0.2-2.8 cm wide, contracted, not dense, sometimes interrupted below;

panicle branches 0.6-5 cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base;

pedicels 0.1-3 mm.

2-4 mm.

3-4 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.

unequal, 0.3-1 mm, shorter than the florets, 1-veined, unawned;

lower glumes shorter than the upper glumes, obtuse to acute, sometimes erose;

lemmas 2.8-4 mm, narrowly lanceolate, purplish, scabrous, sparsely appressed-pubescent on the calluses and lower 1/4 of the midveins and margins, hairs shorter than 0.3 mm, apices acuminate, awned, awns (10)20-40 mm;

paleas 2.6-3.9 mm, narrowly lanceolate, intercostal region sparsely pubescent on the basal 1/3, apices acuminate, scabrous;

anthers 0.9-1.6 mm, purplish.

0.9-1.1 mm, cylindrical, yellowish-brown.

2-2.6 mm, fusiform, brownish.

= 20.

= 40.