Flora of North America species comparison

black, tuberous.

few, blackish, filiform or somewhat tuberous.

erect, scapose, 10-30 cm, glabrous.

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

blade 2x-ternately compound;

leaflets widely ovate or obovate to nearly rotund, apically 3-lobed, 8-30 mm wide, surfaces glabrous.

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

umbels or flowers solitary, (1-)3-6-flowered;

involucral bracts usually 3-foliolate, petiolate and opposite, or sessile with leaflets appearing to be whorls of 6 petiolate leaves, otherwise similar to basal leaves.

panicles or nearly corymbs, few flowered.

sepals not caducous, white to pinkish, showy, elliptic to obovate, 5-18 mm, longer than stamens;

filaments narrowly clavate, 3-4 mm;

anthers 0.4-0.7 mm.

pedicels very slender, elongate;

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

filaments white, 2.5-4 mm;

anthers 0.3-0.5 mm.

(4-)8-12(-15), short-stipitate;

stipe 0.1-0.4 mm;

body ovoid to fusiform, 3-4.5 mm, prominently 8-10-veined.

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.