Flora of North America species comparison

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

20-30 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.

4-10, 2-3-ternate or irregularly so;

petiole 5-10 cm;

terminal leaflet petiolulate, obovate, 1.2-1.8(-20) × ca. 1.5(-2.5) cm, base narrowly cuneate, margins coarsely serrate to nearly incised on distal 1/2, ciliate or not, apex broadly acute, surfaces nearly glabrous;

lateral leaflets 1-2x-lobed or -parted; ultimate lobes 2-5 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-)2-3-flowered cymes;

peduncle proximally nearly glabrous, distally downy;

involucral bracts primarily 3, (1-)2-tiered, simple, dissimilar to basal leaves, obtriangular, 3-cleft to pinnatifid, 2-5 cm, bases clasping, ±connate, margins incised throughout, apex acuminate, surfaces appressed-pilose;

segments primarily 3, linear;

lateral segments unlobed or 1x-lobed; ultimate segments 1-2 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 7-11, greenish white to abaxially reddish, oblong, 6-12(-14) × (2-)3-4.5 mm, abaxially hairy, adaxially glabrous;

stamens 35-55.

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

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

body ovate, flat, not winged, densely white-villous (with long tuft of hairs at base);

beak ±straight, ca. 1 mm, hidden in achene indument, white-tomentose, not plumose.

spheric, rarely cylindric;

pedicel (2-)3-10 cm.

oblong-ellipsoid;

pedicel 10-18 cm.