Flora of North America species comparison

25-95 cm tall, 0.8-1.5 mm thick, erect or ascending;

internodes smooth, shiny, and glabrous for most of their length, scabridulous immediately below the nodes.

25-80 cm, erect, wiry;

internodes mostly glabrous, strigose or glabrous below the nodes.

glabrous, margins hyaline;

ligules 0.3-1 mm, membranous, truncate, ciliolate;

blades 4-16 cm long, 2-7 mm wide, flat, glabrous, usually smooth, occasionally scabridulous.

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.

4-18 cm long, 0.2-0.8 cm wide, narrow, usually exserted;

axillary panicles usually exserted, sometimes partially included in the subtending sheath;

primary branches 0.6-4 cm, ascending to appressed;

pedicels 0.3-1.6 mm, 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.

1.6-3 mm, erect, overlapping the next spikelet on the branch by 1/2 its length.

3-4 mm.

equal to subequal, 1-2.5 mm, much shorter than the florets, scabridulous (particularly over the veins), 1-veined, narrowing from above the broad, overlapping bases to the acute apices, unawned or awned, awns to 1 mm;

lemmas 1.6-2.8 mm, lanceolate, hairy on the calluses, lower 1/2 of the midveins, and margins, hairs 0.3-0.5 mm, apices acuminate, unawned or awned, awns to 1 mm;

paleas 1.6-2.9 mm, lanceolate, basal 1/2 with hairs shorter than 1.

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.

1-1.5 mm, fusiform, brown.

2-2.6 mm, fusiform, brownish.

mm, apices scabridulous, acuminate;

anthers 0.4-1 mm, yellow.

= 40.

= 40.