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 2-pinnate;

petiole 4–15 cm;

rachis inflated;

blade ± ovate, 10–30 cm, most primary leaflets dissected, ultimate divisions monomorphic or dimorphic (terminal more elongate than laterals), narrowly linear, 5–80 × less than 1 mm, terete, margins entire;

cauline leaves 1–2-pinnate.

2–20 cm.

3–12 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.

convex distally;

involucral bracts 0–5, bristle-shaped;

rays (4–)5–7(–11), 2–8 cm some 5+ cm in fruit, ± equal to unequal, spreading-ascending;

involucel bractlets 8–12, linear-lanceolate to ovate, 2–4 mm, scarious-margined, apex acute;

umbellets convex, (18–)20–25(–29)-flowered.

2–5 mm.

5–7 mm.

petals 1-veined;

styles 2 mm, spreading and usually recurved.

petals 1-veined;

styles 1 mm, spreading and usually recurved.

oblong;

mericarps 4–6 mm;

ribs threadlike;

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

oblong;

mericarps 5–8 mm;

ribs threadlike;

oil ducts 3–4 in intervals, 12–13 on commissure.

= 40.