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.

10-80 cm, erect, rounded near the base;

internodes glabrous.

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.

smooth or scabridulous, becoming flattened, papery, and occasionally spirally coiled when old, lower sheaths longer than the internodes;

ligules 4-14(20) mm, membranous, acute to acuminate;

blades 6-25 cm long, 1-2.5 mm wide, flat, becoming involute, scabrous abaxially, hirsute 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.

4-25 cm long, (1)2-6 cm wide, not dense;

primary branches 0.5-10 cm, appressed or diverging up to 40° from the rachises;

pedicels 0.5-6.5 mm, scabrous.

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

3-7 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.

subequal, (1)1.5-3.2(4) mm, smooth or scabridulous distally;

lower glumes 1-veined, sometimes with a less than 1 mm awn;

upper glumes 1/3–2/3 as long as the lemmas, 3-veined, truncate to acute, 3-toothed, teeth sometimes awned, awns to 1.6 mm;

lemmas 3-4.5(7) mm, lanceolate, loosely to densely appressed-pubescent on the lower portion of the mid-veins and margins, hairs to 0.8 mm, apices acute to acuminate, awned, awns (2)6-25 mm, flexuous;

paleas 3-4.5(7) mm, lanceolate, acute to acuminate;

anthers 1.5-2.3 mm, purplish.

1-1.5 mm, fusiform, brown.

1.8-2 mm, fusiform, light brown.

mm, apices scabridulous, acuminate;

anthers 0.4-1 mm, yellow.

= 40.

= 20, 40.