Flora of North America species comparison

fibrous.

erect, 6-18(-20) dm, glabrous.

erect, stout, 40-150(-200) cm.

blade 3-4x-ternately compound;

leaflets orbiculate to obovate, apically 3-cleft or 3-parted, divisions undivided or shallowly 3-lobed, 15-40 mm wide, lobes rounded or somewhat acute, surfaces glabrous or glandular.

blade: basal and proximal cauline 3-5x-ternately compound;

leaflets brownish green to dark green or bright green, ovate to cuneate-obovate, apically undivided or 2-3(-5)-lobed, 15-60 × 8-45 mm, length 0.9-2.6 times width, usually leathery with veins prominent abaxially, margins often revolute, lobe margins entire, surfaces abaxially usually pubescent and/or papillose (i.e., with very minute sessile glands).

terminal, panicles, many flowered.

panicles, apically ± acutely pyramidal, many flowered;

peduncles and pedicels usually glabrous, rarely pubescent or stipitate-glandular.

sepals whitish to purplish, elliptic to ovate or lanceolate, 2-4(-5) mm;

filaments whitish to pinkish, 3-6 mm;

anthers (1.4-)2-4 mm, distinctly apiculate.

usually unisexual, staminate and pistillate on different plants;

sepals 4(-6), whitish, lanceolate, 3-5 mm;

filaments white to purplish, filiform, scarcely dilated distally, 2-6.5 mm, flexible;

anthers 1-3.6(-4) mm, usually strongly apiculate.

10-15, spreading in globose heads, not reflexed, sessile or nearly so;

stipe 0-0.6 mm;

body nearly globose to obovoid to obliquely obovate, laterally compressed, somewhat inflated and papery, 4-7(-8) mm, glabrous to glandular, often with 1 or 2 primary veins on each side, veins sinuous, branched, anastomosing-reticulate;

beak 2-4 mm.

numerous, sessile or nearly sessile;

stipe 0-1.1 mm;

body ovoid to fusiform, 2-4.6 mm, prominently veined, usually pubescent and/or glandular;

beak often dehiscent as fruit matures, ± straight, filiform, 1.5-4.7(-6) mm, about as long as achene body.