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-ternate-pinnate;

petiole 3–6 cm;

blade lanceolate to triangular-ovate, 15–45 cm, most primary leaflets dissected, ultimate divisions monomorphic, linear to lanceolate, 30–120 × 2–8 mm, margins entire;

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

2–20 cm.

5–18 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.

involucral bracts 8–10, linear-lanceolate;

rays 9–20, 2–6.5 cm, ± equal, spreading-ascending;

involucel bractlets ± 10, linear-lanceolate, 3–5 mm;

umbellets convex, 23–27-flowered.

2–5 mm.

2–5 mm.

petals 1-veined;

styles 2 mm, spreading and usually recurved.

petals 1-veined;

styles 0.8–1 mm, ± erect.

oblong;

mericarps 4–6 mm;

ribs threadlike;

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

elliptic-oblong;

mericarps 4–5 mm;

ribs threadlike;

oil ducts 1 in intervals, 2 on commissure.

= 40.