Flora of North America species comparison

erect, coarse, 50-300 cm.

erect, leafy, slender, (20-)30-100(-120) cm, glabrous.

blade ternately and pinnately decompound;

leaflets light to dark green, cordate or nearly orbiculate to ovate or obovate, apically undivided to 2-3(-5)-lobed or -toothed, 11-68 × 5-70 mm, length 0.8-2.6 times width, membranous to firm, margins scarcely revolute, lobe margins entire, surfaces abaxially pubescent to glabrous.

blade (2-)3-ternate;

leaflets obovate to orbiculate or cordate, usually 3-cleft and divisions 3-lobed, thin, 10-20 mm, surfaces abaxially often glandular-puberulent.

racemes or panicles to corymbs, apically ± rounded, many flowered;

peduncles and pedicels often pubescent.

axillary, 1-few flowers, diffuse, leafy;

bracts leaflike, large.

unisexual or bisexual (sometimes bisexual with very few stamens);

sepals 4(-6), white to purplish, elliptic-rounded, 2-3.5 mm;

filaments ascending, white to purplish, filiform to distinctly clavate, 1.5-7 mm, usually rigid;

anthers 0.5-1.5(-2.1) mm, usually blunt or only slightly apiculate.

pedicels abruptly recurved in fruit;

sepals whitish or greenish, often purplish tinged, elliptic, 2-3.5(-4) mm;

stamens 12-20, whitish;

filaments 3-4.5 mm;

anthers 0.5-0.8 mm.

numerous, sessile to stipitate;

stipe 0.5-1.5(-2.4) mm;

body ellipsoid, 3-5 mm, prominently veined, usually pubescent;

beak usually persistent, straight or coiled distally, 0.6-2.5 mm, about 1/2 length of achene body.

(4-)6-12;

stipe 0.3-1.5 mm;

body obliquely obovate to half-rhombic, strongly compressed, (4-)5-6 × 3-4 mm, abaxial margin straight, glabrous or glandular-puberulent, faintly 3-4(-5)-veined;

beak 1-1.5 mm.

= 126.