Herbs, biennial, glabrous. Roots fusiform, woody. Stem solitary, erect, sparsely branched. Basal leaves petiolate, petioles sheathing; blade ternate-2-pinnate; ultimate segments linear-lanceolate. Umbels compound, terminal; bracts absent; rays unequal; bracteoles several, linear or lanceolate, entire. Calyx teeth obsolete. Petals white or purplish, obcordate, base cuneate, apex notched, with narrow inward curved lobule, outer petals of umbellules slightly larger (radiant). Stylopodium low-conic; styles ca. equal to stylopodium, reflexed. Fruit ovoid, slightly dorsally compressed, glabrous; dorsal and intermediate ribs narrowly winged, lateral wings often broader; vittae solitary in each furrow, 2 on commissure. Seed face plane. Carpophore 2-cleft to base.
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