Flora of North America species comparison

(15-)20-80 cm, from caudices on rhizomes, caudices ascending, rhizomes ascending to horizontal.

1-5, simple, deeply divided;

petiole 8-22(-37) cm;

leaf blade orbiculate, 4-10 × 5-15(-20) cm, base sagittate to nearly truncate, margins serrate and incised on distal 1/3-1/2, apex acuminate, surfaces puberulous (more so abaxially);

segments primarily 3, lanceolate to oblanceolate;

lateral segments again 1x-lobed or -parted (proximal lobe occasionally lobed again); ultimate segments 10-30(-35) mm wide.

1(-3+)-flowered, rarely cymes;

peduncle puberulous to villous, distally densely villous;

involucral bracts 3 (secondary involucres with 2), remotely subtending flowers, (1-)2-tiered, simple, ±similar to basal leaves, broadly obtriangular, 3-cleft, 3-10 cm, bases broadly cuneate, connate, margins sharply, irregularly serrate and incised on distal 1/3-1/2, apex acuminate, surfaces puberulous, more so abaxially;

segments 3, lanceolate to oblanceolate;

lateral segments unlobed or 1x-lobed; ultimate lobes (8-)10-15(-20) mm wide.

sepals (4-)5(-6), white, obovate, (8-)10-20(-25) × 5-15 mm, hairy or glabrous;

stamens 80-100.

body obovoid to ellipsoid, (2.5-)3-6 × 3.5-6 mm, winged, strigose or glabrate;

beak straight, 2-6 mm, strigose, not plumose.

spheric to ovoid;

pedicel 7.5-11.5 cm.

=14.