Plants perennial, 30–60 cm, mostly glabrous. Root fusiform. Basal petioles 8–15 cm; blade 2-ternate; ultimate segments ovate, rhombic, 2.5–7 × 1.5–5 cm, abaxially glaucous, sparsely pubescent, margins serrate, or incised. Cauline leaves similar to basal, 1-pinnate or 3-lobed; lobes ovate or lanceolate, 20–30 × 5–10 mm. Umbels 6–8 cm across; bracts absent; rays 6–15, 3–5 cm, unequal; bracteoles 1–7, linear, 3–4 mm, ca. equal to or shorter than pedicels; umbellules ca. 12 mm across, 10–20-flowered; pedicels 1.5–6 mm. Calyx teeth conspicuous, lanceolate, ca. 0.3 mm. Petals white, ovate or broad-ovate, apex mucronate, without incurved lobule. Stylopodium conic; styles 2–3 × stylopodium. Fruit oblong-ovoid, ca. 2.5 × 1.5 mm, base cordate, glabrous; vittae 3 in each furrow, 4 on commissure. Seed face plane. Fl. Jul–Aug, fr. Sep–Oct.
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