Description from Flora of China
Herbs, perennial, low, acaulescent or shortly caulescent, usually forming compact rosettes closely appressed to soil surface. Tap root stout, vertical. Stem base densely clothed in fibrous remnant sheaths. Leaves petiolate; blade oblong, 2–3-pinnatisect; ultimate segments linear. Umbels compound, solitary terminal umbel usually sessile, appearing as a cluster of simple umbels, lateral umbels few, pedunculate, obviously compound; bracts many, foliaceous, 1–2-pinnate; rays 10–15; bracteoles numerous, linear or apex 3-lobed. Calyx teeth prominent, linear-lanceolate or triangular-acuminate, unequal. Petals ovate, entire or emarginate, apex narrowly inflexed. Fruit pale yellow or purplish tinged when mature, flat-globose, dorsally compressed, cordate at both ends; ribs broadly winged, wings corky-spongy, unequal, lateral wings usually broader than dorsal; vittae 1 in each furrow, 2 on commissure. Seed face plane. Carpophore 2-cleft to base.
Three species: Bhutan, China, NE India, Nepal, Sikkim; three species (one endemic) in China.
(Authors: She Menglan (佘孟兰 Sheh Meng-lan); Mark F. Watson)