Flora of North America species comparison

never tuberous.

erect or ascending, never rooting nodally, crisped-pilose, base not bulbous.

erect from short caudices, not rooting nodally, glabrous, not bulbous-based.

basal leaf blades ovate to semicircular in outline, ternately or pinnately 2x-compound, 2.4-8.2 × 2-8.5 cm, leaflets parted and again lobed, ultimate segments elliptic to linear, margins entire (or occasionally a lobe reduced to tooth), apex acuminate to rounded.

broadly rhombic to semicircular in outline, 3-parted, 2.8-4.3 × 3-5.5 cm, segments 3-lobed, ultimate segments lanceolate, margins entire or toothed, apex narrowly acute or acuminate.

receptacle glabrous;

sepals reflexed 1 mm above base, 4-6 × 1.5-3 mm, densely pilose;

petals 5, abaxially red, adaxially yellow, 10-12 × 4-6 mm.

receptacle glabrous;

sepals spreading or reflexed from base, 3-6 × 1-3 mm, glabrous;

petals (0-)5-6, yellow, 3-8 × 1-3 mm.

of achenes hemispheric, 4-7 × 7-10 mm;

achenes 3.4-4.2 × 2.8-3.2 mm, sometimes basally pilose, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lance-subulate, straight or somewhat curved distally, 1.6-2.6 mm.

of achenes hemispheric to globose, 4-5 × 6-7 mm;

achenes 2.2-3.6 × 1.2-1.8 mm, glabrous;

beak filiform, strongly reflexed from base, 0.8-1.5 mm, brittle, often broken.

roots absent.

= 32.