Flora of North America species comparison

never tuberous.

never tuberous.

erect, never rooting nodally, strigose or hirsute, base bulbous and cormlike.

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

blades ovate to cordate in outline, 3-foliolate, rarely merely deeply divided, 2–5.3 × 2.4–5.4 cm, leaflets 1–2x-lobed, ultimate segments oblong to obovate, margins toothed, apex rounded in outline.

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.

receptacle pubescent;

sepals reflexed 2–3 mm above base, 6–9 × 2–4 mm, pilose;

petals 5, yellow, 9–13 × 8–11 mm.

receptacle glabrous;

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

petals 5-17, yellow, 6-12 × 3-6 mm.

ovoid, 6–9 × 5–7 mm;

achenes 2.2–3.2 × 2.2–2.8 mm, glabrous, margin forming narrow rib 0.1–0.2 mm wide;

beak persistent, lanceolate to deltate, 0.2–0.8 mm, slender tip hooked when present.

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.