Plants perennial, 50–100 cm, stout, essentially glabrous. Root cylindrical, ca. 8 × 0.7 cm. Stem 3–5-branched. Basal petioles 18–25 cm; blade 2-ternate; leaflets oblong-ovate or oblong-rhombic, 4–12 × 2–10 cm, margins coarsely serrate or irregularly incised. Cauline leaves similar to basal, 1-pinnate or 3-lobed. Umbels 5–10 cm across; bracts absent, occasionally 1, ca. 2 mm; rays 15–25, 2–4 cm, unequal, scabrid; bracteoles 1–2, linear, ca. 1.5 mm, or absent; umbellules 5–8 mm across, 15–30-flowered, polygamous; pedicels 2–3 mm, subequal, filiform, those of fertile flowers elongating to 6 mm in fruit. Calyx teeth obsolete. Petals white, oblong-ovate, apex mucronate, not inflexed. Stylopodium conic; styles 2–4 × stylopodium, reflexed. Fruit cordate-ovoid, ca. 1.5 × 1.5 mm, glabrous; vittae 3 in each furrow, 4–6 on commissure. Seed face slightly concave. Fl. May–Jul, fr. Aug–Sep.
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