Plants 20–80 cm. Rhizome tuberous, globose, 6–8 mm thick. Stem purplish, hollow, thinly ribbed. Lower stem leaves petiolate, petioles 5–11 cm, sheaths short; blade 3–9 × 5–10 cm, 2–3-pinnate; ultimate segments linear, 2.5–7 × 2–4 mm, entire, scabrous along nerves adaxially. Umbels 3–8 cm across; bracts and bracteoles usually absent; rays 3–7, 4–35 mm, unequal; umbellules 8–15 mm across, 4–9-flowered; pedicels 0.5–1.3 cm, slender, unequal. Calyx teeth obsolete. Petals white or margin purplish, ovate, 5–5.5 × ca. 0.7 mm; apex long-linear, ca. 4 mm. Young fruit broad-ovoid, ca. 2 × 1 mm (mature fruit poorly known). Fl. Jun–Aug.
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