Flora of North America species comparison

black, tuberous.

erect, scapose, 10-30 cm, glabrous.

weakly erect to reclining, 10-30 cm, glabrous.

blade 2x-ternately compound;

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

blade: basal usually ternately compound, distal gradually less divided;

leaflets nearly orbiculate to orbiculate-reniform, apically 4-7-lobed, 20-30 mm wide, lobe margins crenate, surfaces abaxially glaucescent.

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, 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.

sepals white, spatulate to rhombic-spatulate, 1.5 mm;

filaments white, 2-3 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 2.5-3.5 mm, nearly as long as achene body;

body flat, 2.5-4 mm, abaxial margin convex, adaxial margin straight, conspicuously 3-veined on each face;

beak minute.