Plants 20–75 cm. Root conic. Stem purplish, little-branched. Lower petioles 5–12 cm, sheaths ovate, inflated; blade broadly triangular, 4–10 × 3–8 cm, 3–4-ternate/pinnate; primary and secondary pinnae petiolulate; ultimate segments linear (3–) 5–15 × 0.5–1 mm. Umbels 4–9 cm across; peduncles 5–12 cm; bracts and bracteoles absent; rays 6–16, unequal, 2–4(–5) cm; umbellule many-flowered; pedicels 3–5 mm. Calyx teeth minute, triangular. Petals obovate to long-obovate, white, sometimes pink, 1.8–2 × 1.2–1.8 mm, apex obtuse-rounded. Fruit broadly ovoid, 2–4 × 1.5–2 mm, base cordate; ribs slender. Fl. Jul–Sep, fr. Sep–Oct. n = 11*.
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