Flora of North America species comparison

5-30 cm, from rhizomes, rhizomes primarily horizontal.

0-1, ternate;

petiole 4-25 cm;

terminal leaflet ± sessile, rhombic to oblanceolate or obliquely oblanceolate, 1-4.5 × 1.4-3.7 cm, base narrowly cuneate, margins crenate-serrate, serrate, occasionally dentate or incised on distal 1/3-1/2, apex acuminate to obtuse, surfaces glabrous or puberulous to pilose;

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

1-flowered;

peduncle puberulous, villous, or glabrous;

involucral bracts 3, 1-tiered, ternate, ±similar to basal leaves, bases distinct;

terminal leaflet petiolulate or sessile, rhombic to oblanceolate or obliquely oblanceolate, 1-5(-5.5) × 0.5-3 cm, base narrowly cuneate, margins crenate to serrate, serrate to dentate, occasionally incised on distal 1/3-1/2, apex acuminate to acute, surfaces glabrous or puberulous to pilose;

lateral leaflets unlobed or 1x-lobed or -parted, ultimate lobes 5-20 mm wide.

sepals (4-)5(-6), white, rarely pink, or abaxially white or tinged pink or blue and adaxially white, oblong to ovate, 6-25 × 4-8 mm, glabrous;

stamens 30-60.

body ellipsoid or ovoid, 2.5-4.5 × 1-1.5 mm, not winged, puberulous or villous;

beak straight to curved, rarely recurved, 0.5-2 mm, ±glabrous to sparsely puberulous, not plumose.

spheric or nearly so;

pedicel 1-6(-8) cm.