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, usually ternate-2-pinnate-pinnatifid;

petiole sheathing basally to entire length;

blade triangular to rhombic, 4.5–14 × 2.3–5.9 cm, surfaces glabrous;

apical 2–3 pinnule pairs of secondary leaflets with naked intercostal region between rachilla and basalmost pinnule lobes, appearing like petiolule; ultimate segments 300–1000, very narrowly linear, subterete in cross section, 1–4.5 × 0.3–0.7 mm, well separated, not or little overlapping, diffuse, not obscuring elongate intercostal areas along rachillae (best assessed from at least a foot distant from plant);

margins entire, apex acuminate, callus tips 0.1–0.2, terminal segment 1–5 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.

1–10+ per plant, 1 per stem, ascending to erect, not inflated, 9–33 cm, exceeding leaves, 0.5–2 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.

0.9–2.5 cm wide in flower, 4–9 cm wide in fruit, rays 5–15, ascending to spreading, 0.5–6 cm in fruit, subequal, glabrous;

involucel bractlets (0 or)2–10, connate basally, linear or lanceolate, 2–5 mm, longer than flowers, margins usually scarious, not ciliate, entire, glabrous.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

petals yellow, glabrous;

anthers yellow or ochroleucous;

ovary and young fruit glabrous.

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

4–11(–13 mm, shorter 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, oblong or elliptic, 5–9(–10) × 2.5–5 mm, length/width ratio 1.3–2.5;

wings 0.7–1.4 mm wide, 33–75% of body width, paler than body;

abaxial ribs slightly raised;

apex rounded, truncate;

oil ducts 1–2 in intervals, 2–6 on commissure.