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.

(3)5-20(35) cm, erect or geniculate, often rooting at the lower nodes;

internodes glabrous.

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, glabrous, smooth or scabridulous;

ligules 1-3.5 mm, hyaline to membranous, rounded to acute;

blades 1-4(6) cm long, 0.6-1.6 mm wide, flat or involute, smooth or scabridulous abaxially, scabrous or 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.

1.6-6 cm long, 0.2-0.5 cm wide, spikelike, interrupted near the base, long-exserted;

primary branches 0.9-1.2 cm, closely appressed at maturity;

pedicels 1-3 mm, scabrous.

1.8-2.8 mm, borne singly.

1.5-3.2 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.

greenish-gray, glabrous, 1-veined, rounded to subacute;

lower glumes 0.6-1.4 mm;

upper glumes 0.7-1.7 mm;

lemmas (1.5)1.8-2.5(3.2) mm, lanceolate, dark greenish, appressed-pubescent on the margins and midveins, hairs shorter than 0.3 mm, apices scabridulous, acute to acuminate, unawned, sometimes mucronate, mucros shorter than 1 mm;

paleas 1.6-2.6(3.1) mm, lanceolate, scabridulous distally;

anthers 0.5-1.2 mm, purplish.

1-1.4 mm, fusiform, brownish.

0.9-1.5 mm, fusiform, reddish-brown.

= 40, 42.

= 18.