Flora of North America species comparison

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

internodes glabrous.

(15)20-60 (70) cm, somewhat decumbent, 1 or more nodes exposed;

internodes hispidulous below the nodes.

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.

somewhat basally concentrated, most blades not reaching more than (1/4)1/2 of the plant height;

sheaths usually a little shorter than the internodes, not keeled, scabridulous, margins hyaline, basal sheaths rounded, not becoming spirally coiled when old;

ligules 2-9 mm, hyaline, acute, lacerate, often with lateral lobes;

blades 4-10(16) cm long, 1-2.2 mm wide, not arcuate, flat, folded, or involute, scabrous, often glaucous, midveins and margins not thickened, green.

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.

12-30 cm long, 5-20 cm wide, diffuse;

primary branches 1-10 cm, diverging 30-80° from the rachises, naked basally;

pedicels 1-4(6) mm.

3-7 mm.

2.5-4.2 mm.

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.

equal, 1.4-2.5 mm, 1-veined, apices scabridulous, acute to acuminate, minutely erose, unawned or awned, awns to 1 mm;

lemmas 2.5-4.2 mm, narrowly elliptic, usually purplish, scabrous distally, appressed-pubescent on the lower 1/2 - 3/4 of the margins and midveins, apices acuminate, awned, awns 0.5-4.2 mm;

paleas 2.5-3.5 mm, narrowly elliptic, intercostal region sparsely pubescent, apices acuminate, with 2 short (0.1-0.2 mm) awns;

anthers 1.5-2.1 mm, greenish.

1.8-2 mm, fusiform, light brown.

1.9-2.3 mm, fusiform, brownish.

= 20, 40.

= 80, 82.