Flora of North America species comparison

(1.5–)2–9(–12) dm.

petiole (0.5–)2–10(–17) cm;

blade lyrate-pinnatifid, (1–)2–8(–10) cm, lobes 1–3(–5) on each side (rarely early ones undivided), lateral lobes oblong or ovate, 0.3–2(–4) cm × 1–8(–15) mm, sometimes slightly fleshy, margins entire, repand, crenate, or dentate, terminal lobe (ovate or suborbicular), (0.7–)1.5–4.5(–7) cm × (4–)10–30(–50) mm, (surfaces glabrous or margins ciliate).

blade ovate or suborbicular (undivided), margins usually coarsely dentate, rarely subentire; conspicuously auriculate, auricles ovate or narrowly oblong (to 10 × 5 mm), glabrous.

sepals 3–4.5(–5) × 1–1.5 mm, lateral pair slightly saccate basally, margins scarious;

petals yellow, spatulate or oblanceolate, (5–)6–9(–10) × 1.5–2.5(–3.5) mm, base attenuate, apex rounded;

filaments 3–4.5 mm;

anthers 0.7–1.2 mm;

ovules 18–24(–28) per ovary;

gynophore to 0.5 mm.

divaricate to ascending or erect, 3–7 mm, terete or subquadrangular, thickened (narrower than fruit).

erect to erect-ascending, rarely appressed to rachis, torulose, terete, somewhat compressed, or 4-angled, (0.7–)1.5–3 cm × 1.2–2 mm;

style slender, (1–)1.5–3(–3.5) mm.

dark brown, plump, broadly ovoid to oblong or subglobose, 1.2–1.5 × 1–1.2 mm.

= 16.