Flora of North America species comparison

(when present) 1–2 dm.

petiole 1.5–4 cm;

blade 3.5–5 cm, lobes 0–4 on each side, margins shallowly dentate, terminal lobe transversely broadly oblong, 0.6–0.7 cm × 8–11 mm, (distinctly shorter than wide), considerably larger than lateral lobes, margins slightly lobed or shallowly dentate.

sepals widely spreading, oblong-linear, 3.9–4.5 × 1.4–1.8 mm;

petals spreading, bright yellow, narrowly obovate, 7.3–9 × 2–3 mm, claw dark yellow, 2.6–3.3 mm, apex shallowly emarginate, apical notch 0.1–0.3 mm deep;

filaments: median 4–4.5 mm, lateral 2.2–2.5 mm;

anthers 0.8–1.3 mm.

solitary flowers 30–70 mm;

racemes 20–40 mm.

oblong, 1.5–2.3 cm × 4–5 mm, smooth, latiseptate, (margined);

valves thin;

ovules 4–14 per ovary;

style 1.7–3 mm.

3–3.5 mm diam.;

wing 0.2–0.4 mm wide;

embryo straight.

= 22.