Flora of North America species comparison

arising at slightly different heights, not forming just 1 rosette, blue-green, glaucous, often 2–3-ternate-3-pinnately dissected;

petiole broadly sheathing basally to 1/2 length;

blade triangular to ovate, 5–12 × 2.7–10 cm, surfaces glabrous;

penultimate segments narrow, usually less than 2 mm wide, ultimate segments 1000–5000, linear, 1–5 × 0.5 mm, not overlapping, margins entire, apex acute, callus tips 0–0.2 mm, firm but not spinelike, terminal segment 1–5 mm;

cauline leaves 0–2, petioles sometimes sheathing more than 1/2 length.

arising at slightly different heights, not forming just 1 rosette, green or slighlty bluish green, 1–2(–3)-ternate-2–3-pinnate, early-season leaves sometimes pinnate-quinate-ternate-1–2-pinnate;

petiole sheathing basally to entire length;

blade triangular to rhombic, 8–20 × 6–14 cm, 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 24–150, narrowly elliptic, (0.1–)10–50 × (0.8–)1.2–2(–3) mm, relatively wide, margins apparently entire, though actually minutely serrulate (20x), usually not reflexed, apex acute, callus tips 0.3–1 mm, firm but not spinelike, terminal segment 9–15 mm;

cauline leaves 0–3, as little as 2- or 4-parted.

absent or subterranean.

absent.

1–6 per plant, usually 1 per stem, decumbent, spreading, or ascending, strongly inflated at maturity, 5–15(–24) cm, exceeding leaves, 2–8(–11) mm wide 1 cm below umbel, glabrous.

1–40 per plant, 1–2 per stem, erect to widely spreading, not inflated, (1–)8–26 cm, exceeding leaves, 1–2 mm wide 1 cm below umbel, glabrous.

2.5–4.7 cm wide in flower, 3.6–8.6 cm wide in fruit, rays 6–16, spreading, 1–4(–6) cm in fruit, subequal to unequal, glabrous;

involucel bractlets several, distinct, linear-subulate, (3–)4–9(–15) mm, shorter or longer than flowers, margins very broadly scarious, not ciliate, entire, glabrous;

umbellets 8–15-flowered.

1–3.2(–4.5) cm wide in flower, 3–10 cm wide in fruit, rays 6–21, spreading, often reflexed in fruit, (0.5–)1.5–4.3 in fruit, subequal or unequal, glabrous;

involucel bractlets several, usually connate basally, linear or very short and triangular, 1–2.5 mm, subequal to flowers, margins scarious, not ciliate, entire, glabrous.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

petals yellow, glabrous;

anthers yellow;

ovary and young fruit glabrous.

(5.5–)6.5–8(–9) mm, shorter than fruit.

1–4(–5) mm, shorter than fruit, reflexed when fruit is mature.

± dorsiventrally compressed, narrowly elliptic or oblong-oval, 8.8–16(–19.3) × (3–)4.7–7.8 mm, length/width ratio 1.9–3.3;

wings 0.9–2 mm wide, 25–50% of body width, ± same color as body;

abaxial ribs slightly raised;

apex obtuse;

oil ducts usually 1 in intervals, 3–4 on commissure, conspicuous.

dorsiventrally compressed, narrowly elliptic-oblong, linear-oblong, or obovate, 9–14.5 × 3–5.5 mm, length/width ratio 3–3.8, usually reflexed when fully mature;

wings 0.6–1.2 mm wide, (25–)50–90% of body width, paler than body;

abaxial ribs raised;

apex acute to narrowly rounded;

oil ducts (1–)3(–4) in intervals, usually 6–7 on commissure.