Description from Flora of China
Herbs perennial. Root woody; caudex usually stout-tuberous, aromatic. Stem hollow, terete, erect, often purplish, especially at base. Leaves 2–3-ternate-pinnate or pinnatisect; petiolate, sheaths membranous, clasping; ultimate segments oblong or oblong-ovate. Umbels loose compound, terminal and lateral; bracts few, deciduous; bracteoles few to many, linear or pinnatifid. Calyx teeth minute, ovate-triangular, deciduous in fruit. Petals pale yellow to whitish, ovate or ovate-orbicular. Stylopodium conic or low-conic; styles short, reflexed. Fruit oblong-ellipsoid or subglobose, slightly flattened dorsally; ribs 5, all broadly winged, sometimes somewhat unequally; commissure constricted; vittae 3–4 in each furrow, 4–6 on commissure. Seed face concave. Carpophore 2-cleft.
(Authors: She Menglan (佘孟兰 Sheh Meng-lan); Mark F. Watson)