Flora of North America species comparison

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

(20-)30-50 cm, from tubers, tubers ±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.

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

petiole 8-15 cm;

terminal leaflet petiolulate, oblanceolate to obovate, 2-5 × 2-2.5 cm, base broadly cuneate, margins coarsely crenate on distal 1/2, apex obtuse to broadly acute, surfaces glabrous;

lateral leaflets 1x-lobed; ultimate lobes 4-8(-12) 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-)2-5-flowered cymes;

peduncle proximally nearly glabrous, distally densely pubescent;

involucral bracts primarily 3, 2-tiered, simple, dissimilar to basal leaves, 3-cleft to pinnatifid, 2-5 cm, bases clasping, ±connate, margins coarsely crenate throughout, apex narrowly acute to acuminate, surfaces glabrous;

segments primarily 3, linear;

lateral segments unlobed or occasionally 1x-lobed; ultimate lobes 3-5 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 (8-)10-20, white to bluish, oblanceolate, 10-16 × 2-3 mm, sparsely hairy to nearly glabrous;

stamens 50-60.

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

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

body orbiculate, flat, not winged, ±dull or varnished, woolly with long tuft of hairs at base, or glabrous;

beak straight, rarely curved, 0.5-1 mm, glabrous or sparsely villous proximally, not plumose.

spheric, rarely cylindric;

pedicel (2-)3-10 cm.

obconic to fusiform;

pedicel 10-20 cm.

=16.