Description from Flora of China
Herbs annual, small, slender. Root thin. Stem erect, base without remnant sheaths. Leaves 2–3-pinnate or entire, petiole sheath very narrow, margin scarious. Leaves reduced upwards, becoming 3-lobed. Umbels compound, terminal on stem and branches; bracts and bracteoles usually present. Calyx teeth obsolete. Petals white or pinkish, obovate, midvein yellow-brown, prominent, apex narrow, inflexed, abaxially pubescent along midvein. Stylopodium low-conic; styles divergent, ca. twice as long as the stylopodium. Fruit ovoid or subglobose, slightly flattened laterally, mericarp pentagonal in cross section, densely pubescent with clavate-tipped bristles; ribs 5, all rounded or obscure; vittae large, 1 in each furrow, 2 on commissure. Seed face plane. Carpophore shortly bifid at apex.
Three or four species: C Asia; two species in China.
(Authors: She Menglan (佘孟兰 Sheh Meng-lan); Mark F. Watson)