Plants 0.5–1 m. Root cylindrical, with spherical tuberous swellings. Stem corymbose-branched above, branches alternate. Basal leaves sessile or short-petiolate with expanded sheaths; blade triangular-ovate, ternate-2–3-pinnatisect; ultimate segments broadly elliptic, usually pinnately parted, lobules lanceolate, ca. 5 mm, roughened, both surfaces sparsely hispid, apex mucronate. Terminal umbel pedunculate or sessile, lateral umbels 2–3, opposite or verticillate, rarely single, long-pedunculate, exceeding terminal; bracts subulate, deciduous; rays 4–10, unequal; bracteoles subulate, deciduous; umbellules 4–15-flowered. Stylopodium low-conic, base dilated. Fruit ellipsoid, ca. 8 mm; vittae 1 in each furrow, large, 2 on commissure. Fl. and fr. May–Jul.
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