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-pinnate-2-pinnatifid;

petiole sheathing entire length, basal sheaths 11–17 mm wide;

blade rhombic or triangular, 18–30 × 7–30 cm, surfaces glabrous or scaberulous, without papillae or small, triangular hairs abaxially;

apical 2–3 pinnule pairs of secondary leaflets without naked intercostal region between rachilla and basalmost pinnule lobes, appearing sessile;

penultimate segments narrow, usually less than 2 mm wide, ultimate segments 1500–5000, very narrowly linear, subterete, 4–5 × 0.1–0.3 mm, congested, obscuring short intercostal areas along rachillae, margins entire, apex narrowly acute, callus tips 0.1 mm, terminal segment 3–5 mm;

cauline leaves 1–4.

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, 1–2 per stem, erect to ascending, not inflated, 4–41 cm, 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.

4 cm wide in flower, 5.5–13 cm wide in fruit, rays 6–15, spreading to ascending, 0.4–11 cm in fruit, unequal in flower, very unequal in fruit, glabrous or sparsely puberulent with short, triangular hairs;

involucel bractlets 0(–5), distinct, linear, 3–4.5 mm, usually shorter than flowers, margins not scarious, not ciliate, entire, glabrous.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

petals yellow, glabrous;

anthers yellow to pale yellow;

ovary and young fruit glabrous.

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

3–7 mm, longer or a little 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, but body narrow and sometimes elliptic in cross section, narrowly elliptic or narrowly oblong, (12–)15–22 × 3–4.8(–6) mm, length/width ratio 3–5.6, 1.2–2.4 mm thick;

wings 0.4–1 mm wide, 10–30% of body width, paler than body, often thick when fully mature;

abaxial ribs slightly raised;

apex acute;

oil ducts 4–7 in intervals, 1–3 on commissure, obscure;

none in wings.