Flora of North America species comparison

never tuberous.

decumbent or creeping, rooting nodally, hispid to strigose or almost glabrous, base not bulbous.

erect or reclining, hispid or sometimes glabrous.

blades ovate to reniform in outline, 3-foliolate, 1-8.5 × 1.5-10 cm, leaflets lobed, parted, or parted and again lobed, ultimate segments obovate to elliptic or sometimes narrowly oblong, margins toothed, apex obtuse to acuminate.

receptacle hispid or rarely glabrous;

sepals spreading or reflexed from base, 4-7(-10) × 1.5-3(-4) mm, hispid or sometimes glabrous;

petals 5(-150), yellow, 6-18 × 5-12 mm.

pedicellate;

receptacle hispid;

sepals 5, reflexed, 3-4 × 2 mm, sparsely hispid;

petals 5, 4-5 × 2-3 mm.

globose or ovoid, 5-10 × 5-8 mm;

achenes 2.6-3.2 × 2-2.8 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lanceolate to lance-filiform, curved, 0.8-1.2 mm.

ovoid, 8-9 × 6-7 mm;

achenes 30-60 per head, 2 × 2 mm, faces densely tuberculate, glabrous, margin smooth;

beak semicircular, hooked, 0.3 mm.

and lower cauline leaf blades cordate-ovate, 3-foliolate, 5-8 × 3-6(-7) cm, leaflets again cleft or parted, leaflet base obtuse to acute, margins dentate, apex rounded to acute.

= 14, 32.