Flora of North America species comparison

20-30 cm, from tubers, tubers ±vertical.

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-)2-3-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 7-11, greenish white to abaxially reddish, oblong, 6-12(-14) × (2-)3-4.5 mm, abaxially hairy, adaxially glabrous;

stamens 35-55.

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.

oblong-ellipsoid;

pedicel 10-18 cm.