Flora of North America species comparison

(10-)30-50 cm, from tubers, rarely also from rhizomes, tubers vertical, rarely ascending.

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

(1-)3-6(-9), 1-(nearly 2)-ternate;

petiole 3-20 cm;

terminal leaflet sessile, rarely petiolulate, ovate to obovate, 1-3(-6) × (0.4-)0.7-3(-4) cm, base broadly cuneate, margins crenate to serrate on distal 1/2, rarely on distal 2/3, apex obtuse to broadly acute, surfaces pubescent;

lateral leaflets unlobed or 1x-lobed or -parted; ultimate lobes (6-)8-12 mm wide.

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-flowered;

peduncle villous;

involucral bracts 3, borne above middle of scape at anthesis, 1-tiered, simple, dissimilar to basal leaves, obtriangular, 3-cleft, (1-)1.5-4(-5) cm, bases clasping, ±connate, margins incised throughout, apex narrowly acute to acuminate, surfaces pilose;

segments primarily 3, broadly linear;

lateral segments unlobed or occasionally 1x-lobed; ultimate lobes 1.5-2.5 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 (7-)10-17(-25), abaxially blue to violet, adaxially white, linear-oblong, rarely narrowly elliptic, (10-)15-20 × 2-3(-4) mm, abaxially hairy, especially toward base, adaxially glabrous or hairy toward base;

stamens 60-70.

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

stamens 80-100.

body elliptic, flat, 2.7-3.5 × 2.2-2.5 mm, not winged, densely white-woolly;

beak subulate, curved, 1-2.3 mm, hidden in achene indument, white tomentose, not plumose.

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

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

cylindric;

pedicel (7-)9-15(-28) cm.

spheric to ovoid;

pedicel 7.5-11.5 cm.

=16.

=14.