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.

10-30(40) cm, decumbent, terete to somewhat compressed-keeled near the base;

internodes scabridulous 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.

about 1/2 as long as the internodes, margins hyaline;

ligules 0.5-2 mm, hyaline, with lateral, 1-2 mm lobes;

blades 0.7-4(6) cm long, 0.5-1.7 mm wide, flat, occasionally folded, tapering, scabrous abaxially, strigulose adaxially, margins and midveins thickened, whitish, apices narrow, often sharp.

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.

5-15 cm long, 4-14 cm wide, broadly ovoid, open;

primary branches 2-8 cm, capillary, straight to slightly flexuous, diverging 45-80(100)° from the rachises, never appearing fascicled, naked proximally;

pedicels 1-11 mm, usually longer than the spikelets.

1.8-2.8 mm, borne singly.

1.5-2.6 mm, occasionally with 2 florets.

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.

equal, 0.9-2 mm, 1-veined, usually acute to acuminate, occasionally erose and mucronate, mucros to 0.2 mm;

lemmas 1.5-2.5 mm, lanceolate to oblong-elliptic, plumbeous to purplish, sparsely appressed-pubescent on the lower 1/2 of the margins and midveins, hairs to 0.3 mm, apices acute to obtuse, sometimes shallowly bilobed, mucronate, mucros to 0.3 mm;

paleas 1.5-2.6 mm, lanceolate, glabrous, obtuse to acute;

anthers 1-1.5 mm, yellowish to purplish.

1-1.4 mm, fusiform, brownish.

1-1.3 mm, elliptic, brownish.

= 40, 42.

= unknown.