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, 1–3-ternate, basal leaves with petiole conspicuously sheathing basally;

blade rhombic (but sometimes appearing oblong), 4–20 × 3–7 cm, surfaces glabrous;

leaflets remote, primary leaflets sessile and ± confluent with rachis, ultimate segments (1–)3–7, linear, (2–)4–22 × to 1.5 mm, flat but often channeled or rolling lengthwise and thus appearing subterete in cross section, similar to rachis in diam. and shape, margins entire, apex acute, callus tips 0.1–0.3 mm, terminal segment 20–120 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.

1–7+ per plant, 1 per stem, erect, not inflated, 5–25 cm, subequal to leaves, 2–3 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.

2.5–4.5 cm wide in flower, (5.5–)8–15 cm wide in fruit, rays 6–16, ascending to spreading, 1.5–4.5 cm in fruit, subequal, glabrous;

involucel bractlets (4–)5–9, distinct or connate basally, linear, narrowly lance-acuminate or subulate, 1.5–3 mm, subequal to flowers, margins not scarious, not ciliate, entire, glabrous.

petals purple to dark pink, glabrous;

anthers purple;

ovary and young fruit glabrous.

sepals greenish, 1 mm, acute;

petals bright yellow or cream, quickly fading to white, glabrous;

anthers yellow or whitish;

ovary and young fruit glabrous.

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

4–11 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, broadly oblong-elliptic or obovate, 8–15 × 5–10 mm, length/width ratio 1.2–2;

wings 1.4–3 mm wide, (40–)45–90(–100)% of body width, paler than body;

abaxial ribs slightly raised;

apex usually truncate, sometimes rounded to slightly emarginate;

oil ducts about 5 in intervals, 3 on commissure.