Flora of North America species comparison

yellow to medium brown or black, thin, fibrous.

erect, 30-100(-120) dm, glabrous, often from well-developed rhizomes.

erect, coarse, 50-300 cm.

blade 3-4x-ternately compound;

leaflets orbiculate to obovate-cuneate or cordate, apically 3-lobed, 10-30 mm wide, lobe margins coarsely crenate, surfaces glabrous to glandular.

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.

terminal (some flowers in axils of distal leaves), panicles, rather open, many flowered.

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

peduncles and pedicels often pubescent.

sepals whitish or greenish or purplish tinged, ovate, 3.5-4.4 mm in staminate flowers, 1.5-2 mm in pistillate flowers;

filaments purplish, 4-10 mm;

anthers 1.5-4 mm, long-apiculate;

stigma often purplish.

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.

6-9, spreading to reflexed, short-stipitate;

stipe 0.4-1.2 mm;

body fusiform, not laterally compressed, (4-)6-9(-10) mm, tapering at both ends, glandular, strongly 3-veined on each side, veins not anastomosing;

beak 3-4.5(-6) 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.

= 126.