Herbs, perennial, essentially glabrous, inflorescence slightly scabrulous. Root fusiform. Stem erect, branched, striate, sometimes rooting at basal nodes. Basal leaves petiolate, sheathing; blade 1–2-pinnate or ternate-2–3-pinnate; ultimate segments linear or linear-lanceolate, entire. Inflorescence little-branched, umbels compound, terminal and lateral, rarely only terminal; bracts and bracteoles linear; rays rather few, spreading. Calyx teeth conspicuous. Petals white, obovate, base cuneate, apex retuse with small incurved lobule. Stylopodium conic; styles slightly longer than the stylopodium, reflexed. Fruit ovoid, slightly compressed laterally; ribs 5, prominent, corky dilated at base, narrowly winged; vittae 1 in each furrow, 2 on commissure. Seed face plane. Carpophore 2-cleft to base.
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