Description from Flora of China
Herbs biennial. Rootstock thick, long-conic. Stem hollow or solid, ribbed. Leaves pinnate, usually glabrous on both surfaces; pinnae serrate or pinnatifid, sessile. Umbels terminal and lateral; bracts and bracteoles absent; rays numerous, ascending. Calyx teeth minute, triangular. Petals ovate, yellow, incurved at apex. Stylopodium short-conic; styles short, divaricate. Fruit broad ellipsoid, glabrous, strongly flattened dorsally; dorsal ribs thinly filiform, the lateral broadly winged; vittae 1 in each furrow, 2–4 on commissure. Seed face plane.
About 14 species: Asia, Europe; one species (introduced) in China.
(Authors: Pan Zehui (潘泽惠); Mark F. Watson)