Plants (15–)30–60(–150) cm. Stems erect, sparsely pubescent, 3–5(–7)-branched. Basal and lower leaves petiolate, petioles 4–15 cm, glabrous; blade triangular-ovate, 3–7 × 2.5–6 cm, 2-ternate; ultimate segments rhomboidal or flabelliform, 1–5 × 2–3 cm, veins and margins pubescent. Upper leaves 1–2-ternate; ultimate segments elongate-linear, 4–10 × 0.3–0.8 cm. Inflorescence branching, umbels 2–4 cm across in flower, to 8 cm in fruit, terminal on stem and branches; bracts absent; rays (4–) 13–18(–25), 0.5–5 cm; bracteoles 2–4, 0.5–1.2 mm; umbellules (2–)3–4-flowered; pedicels 0.2–2.5 mm. Calyx teeth subulate, ca. 0.3 mm. Petals white, sometimes tinged pink, ca. 1.1 × 0.8 mm. Stylopodium conic; styles elongate; stylopodium and style ca. 0.9 mm. Fruit oblong-ovoid, 2–4 × 1.2–2 mm, sometimes 1 mericarp aborted in fruit; ribs filiform; vittae 1–3 in each furrow, 4 on commissure. Fl. Jun–Jul, fr. Aug–Sep.
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