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, ternate-1–4-pinnate or -pinnatifid;

petiole sheathing basally to entire length;

blade broadly elliptic to rhombic, 6–12 × 4–7 cm, surfaces glabrous;

apical 2–3 pinnule pairs of secondary leaflets without naked intercostal region between rachilla and basalmost pinnule lobes, appearing sessile; ultimate segments 1000–3500, very narrowly linear, subterete in cross section, 0.8–4.8 × 0.1–0.4 mm, congested, obscuring short intercostal areas along rachillae, margins entire, apex acuminate, callus tips 0–0.2 mm, terminal segment 3 mm;

cauline leaves 0.

absent or subterranean.

often present, 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.

1–5 per plant, 1 per stem, ascending or erect, not inflated, 8–40 cm, exceeding leaves, 0.6–3.5(–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.

2.5–4 cm wide in flower, 5–13 cm wide in fruit, rays 5–22, erect to ascending, 0.5–8 cm in fruit, subequal (except sterile ones), glabrous;

involucel bractlets (0 or)2–10, distinct or connate, sometimes connate in pairs and thus appearing 2-fid, linear or lanceolate, 2–10 mm, subequal to or longer than flowers, margins green or scarious, not ciliate, entire or deeply pinnately lobed, glabrous.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

sepals scarious or greenish, to 0.6 mm;

petals yellow, glabrous;

anthers yellow or ochroleucous;

ovary and young fruit glabrous.

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

3–16 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–)8–14 × 4.5–9 mm, length/width ratio 1.3–2.5;

wings 1.1–2.3 mm wide, 30–75% of body width, paler than body, thin, not corky-thickened;

abaxial ribs raised;

apex acute, rounded, broadly rounded;

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