Flora of North America species comparison

5-30(-35) cm, from short caudices on rhizomes, rhizomes primarily horizontal.

10-70 cm, from caudices, caudices ascending to vertical.

1-5(-7), ternate;

petiole 1-10 cm;

terminal leaflet sessile, obtriangular, (0.5-)0.7-1.8(-2.2) × 0.5-1.3 cm, base cuneate, margins crenate to broadly serrate on distal 1/3, apex obtuse to truncate, surfaces villous to nearly glabrous;

lateral leaflets usually 1x-lobed or -parted; ultimate lobes 4-15 mm wide.

3-6(-10), 1-2-ternate;

petiole (2-)4-10(-14) cm;

terminal leaflet petiolulate to ±sessile, broadly and irregularly rhombic to obovate, (1.5-)2.5-4.5(-5.5) × (1-)3-10 cm, base narrowly cuneate, margins incised on distal 1/3, apex broadly acute to nearly obtuse;

surfaces abaxially villous-silky, hispid to villous, or sparsely long-pilose, adaxially glabrous, nearly glabrous, villous-silky, or hispid to villous;

lateral leaflets (2-)3x-parted; ultimate segments (1.5-)2-3.5(-5) mm wide.

1-flowered;

peduncle villous;

involucral bracts 2-3, 1-tiered, simple, ± similar to terminal leaflets of basal leaves, obtriangular, 3-cleft, 0.5-2.5 cm, bases distinct, cuneate, margins crenate to broadly serrate, surfaces villous to nearly glabrous;

segments 3, oblanceolate to obovate;

lateral segments unlobed, 2-8 mm wide.

2-7-flowered cymes or flowers solitary;

peduncle villous, pilose, or hispid to villous;

involucral bracts usually 3-5, occasionally 2 in secondary involucres, 1-2-tiered, ternate, occasionally incompletely ternate, ±similar to basal leaves, greatly reduced, bases distinct;

terminal leaflet petiolulate to ±sessile, broadly and irregularly rhombic to obovate, (1.5-)3-4(-5) × 0.5-1(-2) cm, base narrowly cuneate, margins incised on distal 1/3, apex broadly acute to nearly obtuse, surfaces abaxially hispid to villous, villous-silky, or sparsely long-pilose, adaxially glabrous, nearly glabrous, hispid to villous, or villous-silky;

lateral leaflets (2-)3x-parted or -lobed, lobes frequently unequal; ultimate lobes 1.5-3(-4.3) mm wide.

sepals 4-7, white or tinged blue or abaxially white, proximally blue, and adaxially white, broadly elliptic to ovate, (7-)8-20 × 4-9 mm, abaxially hairy, adaxially glabrous;

stamens 70-80.

sepals 5-9, green to yellow, blue, purple, red, or occasionally white, or abaxially blue, red, yellow and red, or purple, or tinged purple, adaxially white, yellow, yellow and red, blue, or tinged purple, ovate to oblong, 5-17 × (3.5-)5-7(-9) mm, abaxially hairy, adaxially glabrous;

stamens 50-80.

body obovoid, 2-2.5 × ca. 1 mm, not winged, densely woolly;

beak straight, 1-2.5 mm, glabrous.

body irregularly ellipsoid or elliptic, flat, 3-4 × 1.5-2 mm, not winged, tomentose, woolly, or villous;

beak ±straight, distally recurved or strongly hooked, 1-6 mm, glabrous.

spheric;

pedicel 4-18 cm.

spheric;

pedicel 6-15(-23) cm.

=16.