Plants 70–100 cm, perennial. Rootstock short, woody, tuberous, dark brown, with many fibrous fascicled roots. Stems several, erect, branching from base, upper parts flexuose and branched, base without fibrous remnant sheaths. Basal and lower leaves lanceolate or narrowly elliptic, 15–20 × 1.6–2.5 cm, nerves 7–9, base tapering into flat, broad petioles, clasping, prominent abaxially, apex acuminate, rigidly apiculate Middle leaves oblong-elliptic, 8–14 × 1.5–3.5 cm. Apical leaves small, elliptic. Umbels numerous, terminal umbels 1.5–5 cm across; bracts 1–3, or absent, linear, 1–7 mm; rays 4–13, 0.6–4 cm, unequal; bracteoles 5, linear, 2–3(–5) × 0.5–1 mm, slightly shorter than or equaling umbellules; umbellules 5–10 mm across, 6–14-flowered; pedicels ca. 2 mm. Petals bright yellow. Stylopodium low-conic, pale yellow. Fruit ellipsoid, brown, 2.8–3.2 × 2–2.2 mm, apex rounded; vittae (4–)5 in each furrow, 6–8 on commissure, distinct when young, obscure when mature. Fl. and fr. Jul–Sep. 2n = 8*.
Forest margins, among shrubs, mountain slopes, stony sandy areas; at elevations from 200-300 metres.
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