Flora of North America species comparison

never tuberous.

erect to reclining, not rooting nodally, hirsute or sometimes pilose or glabrous, base not bulbous.

prostrate, buried, rooting nodally, glabrous, not bulbous-based.

broadly ovate to semicircular or reniform in outline, 3-parted or -foliolate, 1.5-5.3 × 2.2-8 cm, segments usually again 1(-2)×-lobed, ultimate segments oblong or elliptic to lanceolate or oblanceolate, margins dentate (sometimes dentate-lobulate or entire), apex acute to rounded-obtuse.

reniform, deeply 3-parted, 1.1-2.6 × 1.6-4.3 cm, segments undivided or 1x cleft, margins crenate, apex rounded.

receptacle glabrous;

sepals reflexed 2-3 mm above base, 4-7(-9) × 2-4 mm, hirsute;

petals 5-14, yellow, 5-13 × 1.5-8 mm.

receptacle glabrous;

sepals spreading or reflexed from base, 4-7 × 2-5 mm, glabrous;

petals yellow, 5-6 × 2-3 mm.

hemispheric, 3-7 × 5-9 mm;

achenes 2.6-3.6(-4.8) × 1.8-3(-3.2) mm, glabrous, rarely hispid, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lanceolate to lance-subulate, straight or curved, 0.4-2.2 mm.

hemispheric, 5-7 × 8-10 mm;

achenes 3.8-4.2 × 2-2.2 mm, glabrous;

beak persistent, lanceolate, curved, tip hooked, 1.6-2.4 mm.

roots absent.

= 16.