Flora of North America species comparison

arising at slightly different heights, not forming just 1 rosette, green, ternate-2–3-pinnate or quinate-2–3-pinnate;

petiole sheathing basally to entire length;

blade rhombic or widely obovate, 6–20 × 6–18 cm, surfaces glabrous;

primary leaflets much divided;

ultimate segments 400–1000, linear, 10–50 × 1–5 mm, relatively narrow, crowded, confluent at base with adjacent lobe, petiolule absent, margins entire, usually not reflexed, apex acute, callus tips 0–0.1 mm, terminal segment 17–24(–27) mm;

cauline leaves 0–2, if present, with more than 5 ultimate segments.

arising at slightly different heights, not forming just 1 rosette, green or bluish green, 1–2-ternate-1–2-pinnate;

petiole sheathing entire length;

blade triangular-ovate to orbiculate, 10–40 × 10–30 cm wide, surfaces glabrous;

primary or secondary leaflets broad, serrate or shallowly cleft less than halfway to midrib, sometimes also deeply few-cleft more than halfway to midrib, ultimate segments (which are primary leaflets and their major lobes), 40–800, broadly elliptic to ovate or obovate, 0.1–20(–60) × 5–12 mm, relatively wide, larger lobes with margins usually 3-cleft and coarsely toothed or lobed, apex usually obtuse, callus tips 0–0.1 mm, terminal segment 3–15 mm;

cauline leaves 0–2.

absent.

absent.

1–30 per plant, 1 per stem, ascending or erect, not inflated, 20–80 cm, exceeding leaves, 2.5–6 mm wide 1 cm below umbel, glabrous.

1–3 per plant, 1–3 per stem, ascending or erect, often glaucous, not inflated, 7–40 cm, exceeding leaves, 2–4 mm wide 1 cm below umbel, glabrous.

4.5–8.3 cm wide in flower, 11.5–25 cm wide in fruit, rays 13–25, fertile rays 8–15, spreading, 6–11 cm in fruit, unequal, glabrous;

involucel bractlets (3–)4–7(–9), distinct, linear, to 11 mm, equaling or exceeding flowers, margins scarious, not ciliate, entire, glabrous.

1.3–10.5 cm wide in flower, 7–23 cm in fruit, involucral bracts usually present, often fused basally, sometimes fused nearly throughout in 2–3 groups, to 3 cm, rays 8–20, spreading, 2–11(–15) cm in fruit, usually subequal, glabrous;

involucel bractlets (0–)1, distinct, linear, lanceolate, or oblong, 2–5.5 mm, subequal to flowers, margins scarious, not ciliate, entire, glabrous.

petals yellow, glabrous;

anthers yellow;

ovary and young fruit glabrous.

petals yellow, glabrous;

anthers yellow;

ovary and young fruit glabrous.

6–13 mm, shorter than fruit, spreading to erect when fruit is mature.

5–12 mm, shorter than fruit, spreading to erect when fruit is mature.

dorsiventrally compressed, linear-oblong, 20–32 × 5.8–9.5 mm, length/width ratio 2.2–2.9;

wings 2–3.2 mm wide, 45–70% of body width, paler than body;

abaxial ribs raised and narrowly winglike;

apex usually obtuse, rounded, or truncate;

oil ducts 1(–4) in intervals, 2 on commissure.

dorsiventrally compressed, oblong-ovate to broadly elliptic, 10–16 × 5.5–9 mm, length/width ratio 1.3–2.5;

wings 1–1.7 mm wide 25–45% of body width, paler than body;

abaxial ribs not raised;

apex rounded to obtuse to truncate;

oil ducts 3–4 in intervals, 6–10 on commissure, sometimes obscure.

= 66

= 22.