Herbs, perennial. Taproot fusiform, crown usually clothed with fibrous remnant sheaths. Stem usually solitary. Basal and lower leaves 1–2-pinnate. Umbels terminal and lateral; umbellules 10–30-flowered. Calyx teeth minute or conspicuous. Petals white, rarely pale yellow, outer flowers of the umbel radiant with outer petals enlarged, broad obovate, apex deeply 2-lobed, abaxially puberulent. Stylopodium conic; styles slightly longer than stylopodium, reflexed. Fruit ovoid or ovoid-oblong, pilose to glabrous, dorsally compressed; dorsal and intermediate ribs raised, rarely undulate, lateral ribs broadly winged or nearly as wide as the dorsal; vittae 1 in each furrow, 2 on commissure, filiform, usually extending to the base or at least to 3/4 length of mericarp. Seed face plane or slightly concave. Carpophore 2-parted to base.
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