Flora of North America species comparison

never tuberous.

thickened basally, glabrous.

erect to decumbent, never rooting nodally, hirsute, pilose, or glabrous, base not bulbous.

prostrate, sometimes rooting nodally, glabrous.

blades ovate to narrowly ovate in outline, 3-parted or -foliolate, 3.3-9.5 ×3.5-9.4 cm, leaflets or segments 1-3x-lobed, ultimate segments ovate or oblong-ovate to lanceolate, margins toothed, apex acute or obtuse.

narrowly to broadly ovate, 1.2-4 × 0.7-2 cm, base rounded, truncate or sometimes obtuse, margins entire or denticulate, apex obtuse or acute.

bracts ovate or sometimes lanceolate.

receptacle glabrous;

sepals reflexed 1-2 mm above base, 3-8 × 2-4 mm, hirsute;

petals 5-17, yellow, 6-12 × 3-6 mm.

receptacle glabrous;

sepals 5, spreading or reflexed from near base, 2-4 × 1-3 mm, glabrous;

petals 5-6, 4-6 × 2-4 mm;

nectary scales glabrous.

hemispheric to globose, 6-9 × 7-10 mm;

achenes 3.4-4.4 × 2.4-3.6 mm, glabrous or rarely hispid, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, deltate or lance-deltate, curved, 0.2-1.2 mm.

hemispheric, 2-3 × 3-4 mm;

achenes 1.2-2 × 1.2-1.4 mm, glabrous;

beak lanceolate to subulate, straight or curved, 0.6-0.8 mm.