Flora of North America species comparison

black, tuberous.

erect, scapose, 10-30 cm, glabrous.

erect, to 100 cm, from rhizomes.

blade 2x-ternately compound;

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

blade: leaflets reniform-cordate, apically 3-5-lobed, 15-50 mm wide, lobe margins crenate, surfaces glabrous to glandular.

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.

terminal, panicles, narrow with ascending branches, many 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 yellowish to purple, oblong, 1.5-5 mm;

filaments colored, not white;

anthers 3-4.5 mm, mucronate;

stigma purple.

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

stipe 0.1-0.4 mm;

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

4-13, erect, incurved, not reflexed, sessile;

body fusiform to ovoid, not laterally compressed, adaxial surface 4-6 mm, glandular, veins prominent, not anastomosing-reticulate;

beak (2-)2.5-4(-5) mm.