Description from Flora of China
Herbs perennial, glabrous. Taproot stout. Stems 1–3, striate, often purplish, more or less curved at nodes, little branched above, base clothed in fibrous remnant sheaths. Basal leaves petiolate, sheathing; diffusely 3–4-pinnate; ultimate segments linear or linear-lanceolate, entire. Synflorescence with a few branches; umbels compound, terminal and lateral; bracts absent or occasionally 1–4, linear; bracteoles several, linear or linear-subulate, ca. equaling pedicels. Calyx teeth obsolete. Petals white, obovate, base cuneate, apex retuse with a small incurved lobule. Stylopodium conic; styles 2 × stylopodium, reflexed. Fruit oblong-ellipsoid, slightly dorsally compressed; ribs prominent, nearly equal, very narrowly winged, hollow; vittae 1 in each furrow, 2 on commissure. Seed face plane, in ripe fruit seeds nearly free, easily separating from pericarp. Carpophore 2-cleft to base.
One species: China, Russia (Siberia); C Asia, SW Asia (Caucasus), Europe.
(Authors: Pu Fading (溥发鼎 Pu Fa-ting); Mark F. Watson)