Flora of North America species comparison

5-30(-35) cm, from short caudices on rhizomes, rhizomes primarily horizontal.

(7.5-)10-30 cm, from rhizomes, rhizomes horizontal.

1-5(-7), ternate;

petiole 1-10 cm;

terminal leaflet sessile, obtriangular, (0.5-)0.7-1.8(-2.2) × 0.5-1.3 cm, base cuneate, margins crenate to broadly serrate on distal 1/3, apex obtuse to truncate, surfaces villous to nearly glabrous;

lateral leaflets usually 1x-lobed or -parted; ultimate lobes 4-15 mm wide.

0-2, ternate;

petiole 10-15 cm;

terminal leaflet sessile, ovate to rhombic, (2.5-)3-5(-6) × (2-)2.5-3.5 cm, base slightly oblique to broadly cuneate, margins crenate to serrate on distal 2/3, apex acuminate, surfaces abaxially glabrous, rarely puberulous on veins, adaxially usually glabrous;

lateral leaflets unlobed, rarely 1x-lobed; ultimate lobes (8-)10-20 mm wide.

1-flowered;

peduncle villous;

involucral bracts 2-3, 1-tiered, simple, ± similar to terminal leaflets of basal leaves, obtriangular, 3-cleft, 0.5-2.5 cm, bases distinct, cuneate, margins crenate to broadly serrate, surfaces villous to nearly glabrous;

segments 3, oblanceolate to obovate;

lateral segments unlobed, 2-8 mm wide.

1-flowered;

peduncle sparsely hispid or glabrous;

involucral bracts 3, 1-tiered, simple, ±similar to terminal leaflets of basal leaves, ovate, rarely rhombic, (2.5-)4-8 cm, bases distinct, broadly cuneate, margins crenate to serrate, or dentate on distal 2/3, apex acuminate, surfaces usually glabrous;

lateral leaves unlobed or occasionally 1x-lobed; ultimate lobes 8-15 mm wide.

sepals 4-7, white or tinged blue or abaxially white, proximally blue, and adaxially white, broadly elliptic to ovate, (7-)8-20 × 4-9 mm, abaxially hairy, adaxially glabrous;

stamens 70-80.

sepals usually 5, white, ovate to obovate, rarely oblanceolate, (12-)15-25 × (8-)10-15(-20) mm, glabrous;

stamens 100-120.

body obovoid, 2-2.5 × ca. 1 mm, not winged, densely woolly;

beak straight, 1-2.5 mm, glabrous.

body ovoid, swollen, 2.5-4 × 2-3 mm, not winged, proximally hispid, distally glabrous;

beak straight to subulate, 0.5 mm or less, glabrous.

spheric;

pedicel 4-18 cm.

spheric;

pedicel (5-)7-12 cm.

=16.

=14.