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, ternate-2–3-pinnate-pinnatifid or quinate-2–3-pinnate-pinnatifid;

petiole sheathing basally;

blade ovate, 6.4–20 × 6–18 cm, surfaces sparsely hirtellous to scabrous;

primary leaflets much divided; ultimate segments 400–1000, linear to lanceolate, 4–16(–20) × 1–2 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 4–16(–20) mm;

cauline leaves 0–2, if present, with more than 5 ultimate segments, petioles sometimes sheathing to entire length.

absent or subterranean.

subterranean.

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.

1–8 per plant, 1–2 per stem, ascending or erect, usually deep blackish purple basally, not inflated, 17–30 cm, greatly exceeding leaves, 1.5–5 mm wide 1 cm below umbel, densely to sparsely 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.

4.4–14.8 cm wide in flower, 8.8–12.8 cm wide in fruit, rays 5–14, fertile rays 6–9, erect to spreading, longer ones mostly 5–10 cm in fruit, unequal, densely hirtellous;

involucel bractlets few, distinct, linear to lanceolate, 3–5 mm, longer than flowers, margins scarious, not ciliate, entire, glabrous or hairy.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

petals yellow, glabrous;

anthers yellow;

ovary and young fruit hirtellous when young, then glabrate.

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

8–15 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, narrowly elliptic to oblong, 15–20(–29) × 3.5–10 mm, length/width ratio 2.2–4.8;

wings 1.2–1.5(–2) mm wide, 33–65% of body width, paler than body;

abaxial ribs raised, often narrowly winglike;

apex narrowly rounded to acute;

oil ducts 4 in intervals, 2 on commissure.