Flora of North America species comparison

basal 2–4 pinnate;

petiole 2–15 cm;

blade deltate, ovate, or ovate-lanceolate, 10–20 cm, most primary leaflets dissected, ultimate divisions monomorphic or dimorphic (terminal more elongate than laterals), oblong to filiform, 5–60 mm (terminal sometimes to 80 mm), margins usually toothed or lobed;

cauline leaves usually 1-ternate or 1-ternate-pinnate.

basal (1–)2-pinnate, primary leaflets 7–15;

petiole 6–20 cm;

blade ± ovate, 20–40 cm, most primary leaflets dissected, sometimes only proximal dissected, ultimate divisions monomorphic, linear-lanceolate, 20–150 × 1–4 mm, margins entire, sometimes lobed;

cauline leaves usually 1-pinnate.

2–20 cm.

3–25 cm.

involucral bracts 8–12, linear to narrowly lanceolate;

rays 9–23, 1–2 cm, subequal, ascending or spreading-ascending;

involucel bractlets 4–10, obovate or lanceolate to linear-lanceolate, 3–9 mm, widely scarious-margined or entirely scarious, apex acuminate;

umbellets convex, 18–30-flowered.

± concave distally;

involucral bracts 1–2, linear-lanceolate;

rays 4–7, 3–6 cm some 5+ cm in fruit, unequal, spreading-ascending;

involucel bractlets 12–16, linear-lanceolate, 5–15 mm;

umbellets spheric, sometimes hemispheric, 40–50(–60)-flowered.

2–5 mm.

3–8 mm.

petals 1-veined;

styles 2 mm, spreading and usually recurved.

petals 1–1.5 mm, 1-veined;

styles 0.7–1.2 mm, spreading and usually recurved.

oblong;

mericarps 4–6 mm;

ribs threadlike;

oil ducts 2–3 in intervals, 4 on commissure.

± oblong;

mericarps 4–6 mm;

ribs threadlike;

oil ducts 1 in intervals, 2 on commissure.

= 38.