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, 2-ternate or ternate-1–2-pinnate;

petiole usually sheathing basally, rarely to entire length;

blade triangular or rhombic, 11–20 × 2–12 cm, surfaces glabrous or hairy; ultimate segments 9–25, linear, (25–)50–85(–130) × (0.6–)0.9–1.5(–3.6) mm, relatively narrow, sometimes channeled, margins entire, usually not reflexed, apex acute, callus tips 0–0.1 mm, terminal segment (25–)50–85(–130) mm, length/width ratio (22–)45–60(–88);

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

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.

1–2 per plant, 1 per stem, ascending or erect, not inflated, 8–50(–60) cm, exceeding leaves, 1–4 mm wide 1 cm below umbel, finely hirtellous.

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.

1–7.5 cm wide in flower, 4–15(–23.5) cm wide in fruit, rays 8–17, spreading to ascending, 1.8–6(–8) cm in fruit, unequal, hirtellous;

involucel bractlets (0–)6–10(–11), distinct, linear to lanceolate, 1.5–8 mm, longer than or equaling flowers, margins scarious, not ciliate, entire, glabrous.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

petals yellow fading white, rarely white when fresh, glabrous;

anthers yellow;

ovary and young fruit hairy, often glabrescent.

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

2–7 mm, shorter than fruit, spreading to erect 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, broadly elliptic, (6.5–)7.5–10(–13) × 3.5–6.8(–7.5) mm, length/width ratio (1.2–)1.4–2.1(–2.4);

wings 1.1–2.8 mm wide, 50–105% of body width, paler than body;

abaxial ribs not raised;

apex rounded to truncate;

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