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-2–4-pinnate or -pinnatifid;

petiole sheathing basally to entire length, usually equaling or shorter than blade;

blade ovate, 10–30 × 5–23 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–)2–6 mm;

penultimate segments narrow, usually less than 2 mm wide, ultimate segments 300–1500+, narrowly linear, subterete in cross section, (6.5–)7–15 × 0.1–0.4 mm, appearing spread along leaf because naked portions of petiolules are usually shorter than part of leaflet that has blades, diffuse, not obscuring elongate intercostal areas along rachillae (best assessed at arm’s length), margins entire, apex acuminate, callus tips 0–0.1 mm, terminal segment 0.7–1.2 mm;

cauline leaves (0–)1–2.

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, spreading to erect, not inflated, 30–60 cm, slender or stout, equaling leaves in flower, exceeding them in fruit, 3–8 mm wide 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.

0.7–4.5 cm wide in flower, 12–20 cm wide in fruit, rays 14–30, ascending to spreading, 4–12 cm in fruit, unequal to subequal, glabrous;

involucel bractlets (0 or)2–10, distinct, linear to lanceolate, 2–10 mm, shorter than flowers, margins narrowly 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.

6–15 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, (9–)12–18 × 5–8 mm, length/width ratio 2–2.6;

wings (0.7–)1–1.4 mm wide, (15–)20–35(–40)% of body width, paler than body;

abaxial ribs slightly raised;

apex obtuse to narrowly rounded;

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