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-3–4+-pinnate;

petiole sheathing basally, rarely to 1/2 length;

blade triangular, rhombic, or ovate, 4.8–8.2 × 3.5–11 cm, surfaces glabrous;

apical 2–3 pinnule pairs of secondary leaflets with naked intercostal region between rachilla and basalmost pinnule lobes, appearing like petiolule, this “petiolule” of penultimate segments 1–5(–6) mm;

penultimate segments narrow, usually less than 2 mm wide; ultimate segments 300–4000, narrowly linear, lanceolate, or deltate, dorsiventrally compressed (appearing flat) or subterete in cross section, 1–5(–9 in shade) × 0.1–0.6 mm, diffuse, not obscuring elongate intercostal areas along rachillae (best assessed from at least a foot distant from plant), margins entire, apex acute or acuminate, callus tips 0–0.1 mm, terminal segment 5–6 mm;

cauline leaves 0–2.

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.

1–10+ per plant, 1 per stem, ascending or erect, not inflated, 7–60 cm, stout, exceeding leaves, (1–)2–6 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.

3–6 cm wide in flower, 2.3–9 cm wide in fruit, rays 6–40, ascending to erect, 1–20 cm in fruit, subequal, glabrous;

involucel bractlets (0 or)2–10, distinct, linear to lanceolate, 2–8 mm, equal or subequal to flowers, margins narrowly scabrous, 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.

5–11(–20) mm, usually 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, 6–13 × 3.4–5 mm, length/width ratio 1.6–2.5;

wings 0.5–1.2 mm wide, 14–50% of body width, paler than body;

abaxial ribs prominately raised;

apex rounded to truncate;

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

= 22.