Flora of North America species comparison

few, blackish, filiform or somewhat tuberous.

erect, not scapose, 15-50(-60) cm, glabrous.

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

blade: leaflets reniform to obovate, apically 4-7-lobed, 10-30 mm wide, lobe margins crenate, surfaces abaxially glaucous.

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).

panicles or nearly corymbs, few flowered.

panicles, apically ± acutely pyramidal, many flowered;

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

pedicels very slender, elongate;

sepals white, obovate-spatulate, 2.5-4 mm;

filaments white, 2.5-4 mm;

anthers 0.3-0.5 mm.

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.

3-8, spreading;

stipe 1-3(-4) mm, usually ± 1/2 as long (sometimes nearly as long) as achene body;

body flat, falcate, 3-5 mm, abaxially convex, adaxially concave, conspicuously 3-veined on each face;

beak minute.

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.