Description from Flora of China
Cerefolium Fabricius, nom. rej.
Herbs, biennial or perennial. Taproot slender or thickened. Stem erect, branching and fistulose. Leaf blade 2–3-ternate-pinnate or pinnately decompound; ultimate segments dentate or pinnatifid. Umbels loosely compound, terminal and lateral; bracts absent; rays few, spreading; bracteoles several, margin ciliate, reflexed; pedicels spreading. Flowers polygamous. Calyx teeth obsolete. Petals white or yellowish green, oblong or cuneate with a narrow inflexed apex; outer occasionally enlarged (radiant). Stylopodium conic; styles short. Fruit long-ovoid to linear, apex attenuate into a beak, flattened laterally and often constricted at the commissure, smooth or bristly; ribs obsolete; vittae obscure to obsolete. Seed subterete in cross section, face deeply sulcate.
About 15 species: temperate Asia, Europe; one European species introduced in North America; one species in China.
(Authors: She Menglan (佘孟兰 Sheh Meng-lan); John F. M. Cannon, Mark F. Watson)