Flora of North America species comparison

(10-)30-50 cm, from tubers, rarely also from rhizomes, tubers vertical, rarely ascending.

(1-)3-6(-9), 1-(nearly 2)-ternate;

petiole 3-20 cm;

terminal leaflet sessile, rarely petiolulate, ovate to obovate, 1-3(-6) × (0.4-)0.7-3(-4) cm, base broadly cuneate, margins crenate to serrate on distal 1/2, rarely on distal 2/3, apex obtuse to broadly acute, surfaces pubescent;

lateral leaflets unlobed or 1x-lobed or -parted; ultimate lobes (6-)8-12 mm wide.

1-flowered;

peduncle villous;

involucral bracts 3, borne above middle of scape at anthesis, 1-tiered, simple, dissimilar to basal leaves, obtriangular, 3-cleft, (1-)1.5-4(-5) cm, bases clasping, ±connate, margins incised throughout, apex narrowly acute to acuminate, surfaces pilose;

segments primarily 3, broadly linear;

lateral segments unlobed or occasionally 1x-lobed; ultimate lobes 1.5-2.5 mm wide.

sepals (7-)10-17(-25), abaxially blue to violet, adaxially white, linear-oblong, rarely narrowly elliptic, (10-)15-20 × 2-3(-4) mm, abaxially hairy, especially toward base, adaxially glabrous or hairy toward base;

stamens 60-70.

body elliptic, flat, 2.7-3.5 × 2.2-2.5 mm, not winged, densely white-woolly;

beak subulate, curved, 1-2.3 mm, hidden in achene indument, white tomentose, not plumose.

cylindric;

pedicel (7-)9-15(-28) cm.

=16.