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 to yellow-green, pinnate-2-pinnatifid;

petiole usually sheathing basally, rarely 1/2 or entire length;

blade lanceolate to narrowly oblong, 3.5–15 × 1–6 mm, surfaces glabrous;

primary leaflets mostly with well-developed petiolules, not confluent with rachis, longer than rachis segments separating them; ultimate segments 15–40, linear, not or only slightly wider in middle than at either end, 0.5–10(–50) × 0.5–1 mm, margins entire or with tiny lobes if one counts tiny lobes as lobes rather than ultimate segments, apex acuminate, callus tips 0.3 mm, terminal segment 1.5–5(–10) mm;

cauline leaves 0.

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.

5–50+ per plant, 1 per stem, ascending to erect, not inflated, 4–25 cm, equaling or 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.

0.9–2.2 cm wide in flower, 2.8–5.6 cm wide in fruit, rays 7–15, spreading to reflexed, 0.8–2.3 cm in fruit, equal or unequal, glabrous;

involucel bractlets 9–13, connate to 60% their length, linear to ovate, longer than pedicels, subequal to flowers, margins broadly scarious, not ciliate, entire or lobed, glabrous.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

petals yellow to purplish, glabrous;

anthers yellow;

ovary and young fruit glabrous.

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

0.5–5 mm, shorter than or rarely subequal to fruit.

± 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, ovate to broadly elliptic, 5–9 × 2.5–4.3 mm, length/width ratio 1.3–2.6;

wings 0.5–1 mm wide, 20–40% of body width, paler than body;

abaxial ribs slightly to distinctly raised, narrowly winglike;

apex usually rounded, to truncate;

oil ducts 1–3 in intervals, 6–10 on commissure.