Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

30-100 cm, erect, rounded near the base, not rooting at the lower nodes;

internodes glabrous for most of their length, minutely pubescent to hirtellous 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.

longer than the internodes, smooth or scabridulous, not becoming spirally coiled when old;

ligules 4-10 mm, membranous, firm, acute, lacerate;

blades 10-60 cm long, 1-2 mm wide, usually involute (occasionally flat), scabrous abaxially, hispidulous adaxially.

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.

10-40 cm long, 0.6-2.4 cm wide, contracted, grayish-green;

primary branches 0.2-7 cm, diverging up to 40° from the rachises, stiff, spikelet-bearing to the base;

pedicels 0.1-6 mm, strongly divergent, hispidulous.

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

3.8-5 mm, grayish-green.

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.

equal, (1.8)2-3 mm, shorter than the florets, glabrous and smooth proximally, scabridulous distally, faintly 1-veined, acute;

lemmas 3.8-5 mm, narrowly lanceolate, calluses hairy, hairs to 0.5 mm, lemma bodies glabrous and smooth below, scabrous distally, apices acuminate, unawned or awned, awns to 6 mm, straight;

paleas 3.8-5 mm, narrowly lanceolate, glabrous below, acuminate;

anthers 1.5-2.2 mm, greenish.

0.8-1 mm, fusiform, brownish.

2.5-3.5 mm, fusiform, brownish.

= 20, 22, 28.

= 40, 50.