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.

25-100 cm tall, 0.5-1.5 mm thick, erect, geniculate, wiry, freely branched, branches stiff, geniculate, widely divergent;

internodes scabridulous throughout.

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.

shorter than the internodes, glabrous;

ligules 1-2.5(4) mm, truncate, lacerate, with lateral lobes;

blades 2-8 cm long, 0.5-2 mm wide, flat or folded, smooth or scabridulous abaxially, scabridulous 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.

4-14 cm long, 6-15 cm wide, open, not dense, usually purple;

primary branches 1-7.5 cm, diverging 30-90° from the rachises, stiff, naked basally;

pedicels 2-13(20) mm, scabrous.

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

3-4.5 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.

2-3 mm, shorter than the lemmas, 1-veined, veins scabrous, apices gradually acute to acuminate, occasionally mucronate, mucros to 0.4 mm;

lemmas 3-4.5 mm, lanceolate, purplish, appressed-pubescent on the lower 1/2 - 3/4 of the margins and midveins, apices acuminate, awned, awns 2-13 mm, straight;

paleas 3-4.5 mm, lanceolate, acuminate;

anthers 1.5-2.3 mm, purple to yellow.

1-1.5 mm, fusiform, brown.

2-2.4 mm, oblong, compressed, yellowish-brown.

mm, apices scabridulous, acuminate;

anthers 0.4-1 mm, yellow.

= 40.

= 20, 23, 24, 40.