Flora of North America species comparison

never tuberous.

not thickened basally, glabrous or somewhat canescent proximally.

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

erect or ascending, rooting at proximal nodes, glabrous or sparsely hirsute.

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.

lanceolate, 5.9-12.2 × 1.1-2.4 cm, base rounded-obtuse to acuminate, margins denticulate, apex acuminate.

bracts linear or lanceolate.

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 5, spreading or sometimes reflexed from base, 3-5 × 2-3 mm, glabrous;

petals 5, 5-8 × 2-3 mm;

nectary scales glabrous.

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.

short-ovoid to depressed-globose, 5-7 × 4-8 mm;

achenes 1.8 × 1.2-1.4 mm, glabrous;

beak lanceolate, straight, 0.6-1.2 mm.