Flora of North America species comparison

10-45(70) cm, geniculate, often rooting at the lower nodes, glabrous or puberulent below the nodes;

internodes often smooth, shiny, glabrous.

5-40 cm, slender, erect;

internodes mostly glabrous, scabridulous or smooth, scabridulous or strigulose below the nodes.

shorter than the internodes, glabrous for most of their length, margins shortly (0.3-1.2 mm) pubescent distally, not becoming spirally coiled when old;

ligules 0.2-0.5 mm, truncate, erose, ciliate;

blades (1)3-10 cm long, 1-4.5 mm wide, flat, smooth or scabridulous.

shorter or longer than the internodes, smooth or scabridulous;

ligules 1-2.6 mm, hyaline, truncate to obtuse, sometimes with lateral lobes;

blades 0.5-4(10) cm long, 0.8-2 mm wide, flat or involute, scabrous abaxially, shortly pubescent adaxially.

3-15 cm long, 1-1.6 cm wide, contracted, often interrupted below;

branches 0.4-5.5 cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base;

pedicels 0.1-4 mm, scabrous to hirsute;

disarticulation above the glumes.

5-16.2(21) cm long, 1.5-6.5 cm wide, open;

primary branches 8-42 mm, often capillary, diverging 25-80° from the rachises;

pedicels 2-7 mm, straight or curved, but rarely curved as much as 90°.

1.8-2.8 mm, borne singly.

0.8-1.5 mm.

unequal, shorter than the florets, thin and membranous throughout, unawned;

lower glumes lacking or rudimentary, veinless, rounded and often erose;

upper glumes 0.1-0.3 mm, veinless;

lemmas 1.8-2.8 mm, oblong-elliptic, mostly scabrous, calluses hairy, hairs to 0.8 mm, veins greenish, lower 1/4 of the midveins with a few appressed hairs, apices acute to acuminate, awned, awns 1.5-5 mm, straight;

paleas 1.8-2.8 mm, oblong-elliptic, acute to acuminate;

anthers 0.2-0.5 mm, yellow.

sparsely strigulose, at least near the apices, 1-veined;

lower glumes 0.5-0.8 mm, obtuse to acute;

upper glumes 0.6-0.9 mm, broader than the lower glumes, obtuse;

lemmas 0.8-1.5 mm, lanceolate, brownish to purplish, glabrous or the midveins and margins appressed-pubescent, apices obtuse to subacute, unawned;

paleas 0.8-1.4 mm, shortly pubescent or glabrous;

anthers 0.2-0.7 mm, purplish.

1-1.4 mm, fusiform, brownish.

0.6-0.9 mm, fusiform to elliptic, brownish.

= 40, 42.

= 60, 80.