Flora of North America species comparison

10-40(50) cm, decumbent, usually all the nodes concealed by the sheaths;

internodes mostly scabrous or smooth, hispidulous below the nodes.

10-60(100) cm, decumbent-ascending, bases somewhat compressed-keeled;

internodes glabrous, shiny below the nodes.

glabrous, margins hyaline;

ligules 0.2-1 mm, firm, truncate, ciliate, without lateral lobes;

blades 2-7(11) cm long, 1-2.8(4) mm wide, flat, occasionally conduplicate, smooth or scabridulous abaxially, scabridulous adaxially, margins and midveins not conspicuously thickened, greenish, apices acute, not sharp.

strongly basally concentrated, most blades not reaching more than 1/5 of the plant height;

sheaths shorter than the internodes, rounded, not keeled, scabridulous or smooth, not becoming spirally coiled when old;

ligules 2-5(7) mm, hyaline, acuminate, lacerate, often with lateral lobes;

blades 1-3(5) cm long, 0.3-0.9 mm wide, tightly involute or folded, arcuate, scabridulous, midveins and margins not thickened, green, apices somewhat sharp-pointed.

7-21 cm long, 3-15 cm wide, diffuse;

primary branches 1-8 cm, diverging 30-90° from the rachises, stiff, naked basally;

pedicels 1-8 mm, sometimes appressed to the branches.

6-21 cm long, 4-16 cm wide, broadly ovoid, open;

primary branches 3-12 cm, capillary, lower branches spreading 30-90° from the rachises, never appearing fascicled;

pedicels 3-14 mm, longer than the spikelets.

2-3.5 mm.

1.2-2.1 mm, occasionally with 2 or 3 florets.

equal, 1.3-2.5 mm, scabridulous, 1-veined, apices acute to acuminate, minutely erose, unawned or awned, awns to 1.1 mm;

lemmas 2-3.2(3.5) mm, narrowly elliptic to lanceolate, appressed-pubescent on the basal 1/2 - 3/4 of the margins and midveins, apices scabrous, acuminate, awned, awns 0.5-4 mm;

paleas 2-3.2(3.5) mm, narrowly elliptic, intercostal region sparsely pubescent, apices acuminate;

anthers 1.2-2.1 mm, greenish.

equal, 0.6-1.7 mm, purplish, scabridulous, particularly on the veins, 1-veined, apices acute;

lemmas 1.2-2.1 mm, lanceolate to oblong-elliptic, somewhat plumbeous, glabrous, usually smooth, occasionally scabridulous near the apices, apices acute, unawned or mucronate, mucros to 0.3 mm;

paleas 1.2-2.1 mm, lanceolate, glabrous, acute;

anthers 1-1.3 mm, greenish-yellow to purplish at maturity.

1.7-2 mm, fusiform, brownish.

0.8-1 mm, fusiform, brownish.

= 20, 21.

= 20, 22, 28.