Plants 30–90(–110) cm. Taproot short, woody. Stem sparingly branched above. Basal and lower petioles 12–22 cm, sheaths small; blade triangular, 3–4-ternate/pinnate, proximal pinnae petiolulate; ultimate segments linear, 2–7 × 0.5–1 mm, entire or 1–3-toothed. Leaves reduced upwards, sheath prominent, larger than blade in uppermost leaves. Umbels 3–6 cm across; peduncles 4–11 cm; bracts absent or 1–2, linear; rays 8–19, 2–5 cm; bracteoles 3–10, linear, as long as pedicels; umbellules 12–21-flowered; pedicels unequal. Calyx teeth minute, ovate, ca. 0.4 mm. Petals ovate to obovate, white, sometimes flushed purple, 1.2–1.5 × 1–1.3 mm, apex obtuse-rounded. Stylopodium dark purple, margin wavy. Fruit ovoid to broadly ovoid, ca. 2.4 × 1.8 mm, ribs filiform to inconspicuous, base caudate, often asymmetric. Fl. Jul–Sep, fr. Aug–Oct.
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