Description from Flora of China
Dasyloma de Candolle; Phellandrium Linnaeus.
Herbs, perennial, glabrous. Roots fibrous or fusiform to ovoid tubers. Stems erect, branching, decumbent, weakly diffuse or stoloniferous, hollow, angular, striate, rooting at basal nodes. Basal and lower leaves petiolate, wholly sheathing; blade 1–4-pinnate, homomorphic or heteromorphic to the cauline leaves. Umbels compound, loose, terminal and axillary or leaf-opposed; bracts absent, or occasionally 1; rays 4–15(–30); bracteoles numerous. Calyx teeth prominent, lanceolate, nearly as long as stylopodium. Petals white or pale pink, obovate, base cuneate, apex emarginate, with small incurved lobule, outer petals in umbellule usually enlarged (radiant). Stylopodium conic; styles elongate, erect or divergent, sometimes reflexed in fruit. Fruit ovoid or subglobose, slightly compressed dorsally or laterally, glabrous; dorsal and intermediate ribs slightly thickened, corky, or somewhat protruding, filiform, subequal; lateral ribs dilated, subtriangular, corky; vittae solitary in each furrow, 2 on commissure. Seed face plane. Carpophore obsolete.
Between 25 and 30 species: Africa, Asia, Europe, North America; five species in China.
(Authors: Pu Fading (溥发鼎 Pu Fa-ting); Mark F. Watson)