Flora of North America species comparison

never tuberous.

erect, never rooting nodally, hirsute, base not bulbous.

erect, glabrous, rooting at base, only very rarely rooting at proximal nodes.

basal and cauline, basal and proximal cauline leaf blades reniform to semicircular in outline, 3-lobed or -parted, 1-5 × 1.6-6.8 cm, base truncate to cordate, segments usually again lobed or parted, sometimes undivided, margins crenate or crenate-lobulate, apex rounded or occasionally obtuse.

cordate to reniform in outline, 3-parted, 1.3-3 × 1.8-3.8 cm, segments cleft, ultimate segments elliptic to lanceolate, margins toothed, apex acute.

receptacle glabrous;

sepals spreading, 7-9 × 2-4 mm, hirsute;

petals 5, yellow, 10-15 × 8-11 mm.

receptacle pubescent or glabrous;

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

petals 3-5, 2-5 × 1-3 mm;

nectary on petal surface, scale poorly developed and forming crescent-shaped or circular ridge surrounding but not covering nectary;

style absent.

nearly globose, 7-10 mm wide;

achenes 2.4 × 2.6-2.7 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide;

beak persistent, lanceolate, strongly hooked or curved, 1.6-2 mm.

ellipsoid or cylindric heads, 5-13 × 3-7 mm;

achenes 1-1.2 × 0.8-1 mm, glabrous;

beak deltate, usually straight, 0.1 mm.