Flora of North America species comparison

unbranched or branched distally, 3–10 dm.

branched distally, 3–9 dm.

petiole (winged), (1–)2–10(–17) cm;

blade ± lyrate-pinnatifid to pinnate to pinnatisect, (5–)10–40(–60) cm × 30–100(–200) mm, (margins sinuate-dentate, sometimes ciliate), lobes 2–4(–6) each side, (terminal lobe oblong-obovate, obtuse, large, blade surfaces usually setose).

(early deciduous);

petiole 1.5–6 cm;

blade lyrate-pinnatifid, 3–10(–15) cm × 10–65 mm, lobes 1–3 (or 4) each side.

(middle and distal) sessile;

base auriculate to amplexicaul, (margins subentire).

shortly petiolate;

blade (often lanceolate, reduced in size distally), base tapered or cuneate, not auriculate, (apex acute).

not paniculately branched, (with open flowers overtopping or equal to buds).

paniculately branched.

sepals (3–)4–6.5(–8) × 1.5–2 mm;

petals deep yellow to yellow, obovate, 6–11(–13) × (2.5–)3–6(–7) mm, claw 3–7 mm, apex rounded;

filaments 4–6(–7) mm;

anthers 1.5–2 mm.

sepals 3–8 × 1–1.7 mm;

petals pale yellow, narrowly obovate, 7–15 × 3–4 mm, claw 2–3 mm, apex rounded;

filaments 3–6 mm;

anthers 1.5–2 mm;

gynophore 1–1.5 mm in fruit.

ascending to spreading, (5–)10–25(–30) mm.

spreading to divaricately ascending, (slender), (5–)10–15(–25) mm.

ascending to somewhat spreading, torulose, terete, (2–)3–8(–11) cm × 2–4(–5) mm;

valvular segment with 8–15 seeds per locule, (1.3–)2–5(–7.5) cm, terminal segment seedless, 8–22 mm.

(stipitate), spreading to divaricately ascending, strongly torulose, linear, subcylindric, 1.5–3 cm × 1.5–2 mm;

valvular segment with 5–13 seeds per locule, 1.2–2.5 cm, terminal segment seedless or 1-seeded, (conic), 3–6 mm.

black, brown, or reddish, 1.1–2 mm diam.;

seed coat very finely reticulate-lightly alveolate, not mucilaginous when wetted.

brown or yellow, 0.6–1.2 mm diam.;

seed coat finely reticulate-alveolate, not mucilaginous when wetted.

= 20.

= 16.