Plants 50–100 cm. Taproot surface tawny to pale yellow, inner parts white, starchy. Branches remote and spreading, often alternate, branchlets alternate or opposite. Petiole 3–15 cm; blade 4–10 × 2–5 cm; pinnae broadly ovate, pinnatifid; ultimate segments oblong-lanceolate, 2–4 × 1–2 mm. Leaves reduced upwards, the uppermost reduced to linear or bladeless sheaths. Umbels 3–8 cm across; bracts absent or 1–3, small, ca. 1 cm; rays 4–10, 2.5–10 cm, spreading; bracteoles few, linear, 4–6 mm; umbellules 8–20-flowered. Petals pale purplish when young becoming white. Fruit ovoid-globose, 2–3 × 1.8–2.5 mm. Fl. and fr. Apr–Jun.