Flora of North America species comparison

(7-)10-25(-30) cm, from caudices, caudices ascending to primarily vertical.

30-100(-110) cm, from caudices, rarely with ascending rhizomes, caudices ascending to vertical.

5-15, 2-ternate, occasionally irregularly so;

petiole 2-10 cm;

terminal leaflet sessile or basally attenuate and appearing petiolulate, obovate to obtriangular, 0.5-3 × 0.5-2 cm, base narrowly cuneate to cuneate, margins incised to dissected on distal 1/3-1/2, apex broadly acute to obtuse, surfaces villous;

lateral leaflets 2x-parted, division frequently irregular; ultimate segments 1-2.6 mm wide.

1-5, ternate;

petiole 5-35 cm;

terminal leaflet sessile or nearly so, oblanceolate to obovate, 2-9(-12) × 2-5(-7) cm, base cuneate to broadly cuneate, margins coarsely serrate and incised on distal 1/2, apex acuminate to narrowly acute, surfaces pilose, more so abaxially;

lateral leaflets usually 1-2x-lobed or -parted, occasionally unlobed; ultimate lobes 10-30(-40) mm wide.

1(-2)-flowered;

peduncle villous;

involucral bracts 3(-4), 1-tiered, ±similar to basal leaves, highly reduced, 2-ternate or irregularly so, bases distinct;

terminal leaflet sessile or basally attenuate and appearing petiolulate, obovate to pinnatifid, 1-3.5 × 0.5-2 cm, bases narrowly cuneate to cuneate, margins incised to dissected on distal 1/3-1/2, apex broadly acute to obtuse, surfaces villous;

lateral leaflets 2x-parted, division frequently irregular; ultimate segments 1-2.5 mm wide.

(1-)3-9-flowered cymes;

peduncle villous;

primary involucral bracts 3(-5), secondary involucral bracts 2(-3), (1-)2-tiered, ternate, ±similar to basal leaves, bases distinct;

terminal leaflet ±sessile, elliptic to oblanceolate, 2-10(-12) cm (2 cm in secondary involucre) × 2-5(-7) cm, bases cuneate, margins coarsely serrate and incised on distal 1/2, apex acuminate to narrowly acute, surfaces pilose, more so abaxially;

lateral leaflets unlobed or 1x-lobed or -parted; ultimate lobes 8-25(-35)mm wide.

sepals (5-)6-9, white, or abaxially white, tinged blue, and adaxially white, ovate, rarely oblong or narrowly obovate, 8-20 × 6-10 mm, abaxially hairy, rarely glabrous, adaxially glabrous;

stamens 80-100, whitish;

styles white.

sepals usually 5, green, yellow, or red (rarely white or abaxially green to green-yellow and adaxially green or yellow and tinged red), oblong, ovate, or obovate, 6.5-20 × 2.5-10mm, abaxially hairy, adaxially glabrous or nearly so;

stamens 50-70.

body ovoid, 2-4 × 1-1.5 mm, not winged, woolly;

beak straight, 2-4(-6) mm, glabrous.

body obovoid, 2-3.7 × 1.5-2mm, not winged, densely woolly;

beak curved, 1-1.5mm, puberulous, not plumose.

spheric, rarely cylindric;

pedicel (2-)3-10 cm.

oblong-ellipsoid, rarely obconic;

pedicel 13-25(-30) cm.