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 blue-green, 2–3 pinnate or 2–3-pinnatifid;

petiole sheathing basally;

blade narrowly oblong to lanceolate, (5–)7–24 × 1.5–5 cm, surfaces glabrous;

primary leaflets mostly with well-developed petiolules, not confluent with rachis, at least proximal ones shorter than rachis segments separating them, ultimate segments 45–150, linear or narrowly elliptic to oblong, 1–15 × mostly 1–1.5(–2) mm wide, margins entire, apex acute, callus tips 0–0.5 mm, terminal segment 9–15 mm;

cauline leaves 0.

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 per plant, 1 per stem, curved-ascending or nearly erect, often glaucous, slightly inflated distally, 5–32 cm, equaling or exceeding leaves, 2–5 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.

1.7–4 cm wide in flower, 4.5–10.5 cm wide in fruit, rays 8–15, ascending to suberect, to 6 cm in fruit, subequal or unequal, glabrous;

involucel bractlets 3–8, partly connate in groups, linear to lanceolate, sometimes elliptic, (2–)4–10 mm, equaling or exceeding flowers, margins inconspicuously scarious, not ciliate, entire, 3-dentate, or rarely pinnatifid, glabrous.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

petals yellow, fading to white, glabrous;

anthers yellow or yellow-green;

ovary and young fruit glabrous.

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

8–20 mm, longer than 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, broadly elliptic to elliptic-oblong, (6–)10–20 × (3.5–)5–10 mm, length/width ratio 1.2–2.4;

wings 0.8–2.2 mm wide, 35–140% of body width, paler than body;

abaxial ribs raised;

apex rounded to obtuse;

oil ducts 2–3 in intervals, 4 on commissure.