Herbs, perennial, entirely glabrous. Taproot elongate. Stem solitary, erect, base densely clothed in fibrous remnant sheaths. Leave petiolate; blade broadly ovate, 3-pinnatisect; ultimate segments linear. Umbels compound, terminal on stem and branches; bracts absent; bracteoles several, ovate or ovate-lanceolate. Flowers subsessile, forming numerous globular-capitate umbellules, central flowers in umbellules staminate, peripheral flowers pistillate, median flowers bisexual. Calyx teeth short, acute. Petals pale green, ovate, apex narrow inflexed, abaxially puberulous. Stylopodium low-conic, base slightly dilated, lobed; styles recurved. Fruit ellipsoid, strongly dorsally compressed; dorsal ribs filiform, prominent, lateral ribs broadly winged; vittae 1 in each furrow, 2–4 on commissure. Seed face plane. Carpophore 2-cleft to base.

One species: China, Kazakhstan, Russia (W Siberia).

(Authors: She Menglan (佘孟兰 Sheh Meng-lan); Mark F. Watson)