Flora of North America species comparison

slender, 0.8-1.8 mm thick.

erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers.

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.

persistent, blades ovate to rhombic, undivided or rarely innermost 3-parted, 1.1-5.3 × 0.9-3.6 cm, base obtuse, margins crenate with 5 crenae, apex rounded.

pedicels pilose;

receptacle pilose;

sepals 4-6 × 1.5-3 mm, abaxially pilose, hairs colorless;

petals 5, 6-8 × 2-4 mm;

nectary scale glabrous.

receptacle glabrous;

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

petals (0-)5-6, yellow, 3-8 × 1-3 mm.

depressed-globose, 4-6 × 5-7 mm;

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

beak slender, curved, 0.2-0.3 mm.

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.

= 16.

= 32.