Erect annual herbs. Leaves 2–3-pinnate, with long, narrow segments. Umbels numerous, compound, pedunculate; involucre generally present and of several bracts, occasionally absent or of only a single setaceous bract; involucel present, of several narrow bracteoles. Flowers all hermaphrodite. Calyx-teeth absent or very small. Petals white, with an inflexed lobule, emarginate above. Fruit papillose, hairy or verruculose, ovate, with no distinct beak, strongly laterally compressed and narrowed to the commissure; primary ribs slender and scarcely prominent to well defined, the mericarps rounded to obscurely 3-angled dorsally; vittae solitary in the valleculae and 2 on the commissure, large and conspicuous; stylopodia conical, disk almost absent, styles slender to very slender; carpophore bifid to the base. Endosperm rounded to bluntly pentagonal in section, the commissure almost flat.