Erect annual, up to 0.4 m tall. Leaves cauline, pinnate, glabrous. Umbels leaf-opposed, sessile or rarely short pedunculate, involucre bracts absent. Flowers white, stylopodium flat, level with or sunken below fruit apex, styles remaining short. Fruit broadly elliptic, dark brown to black, mericarps dorsally compressed, smooth, dorsal ribs indistinct, marginal ribs winged, prominently involute, homomorphic, vittae present, with additional solitary vittae in marginal wings, rib oil ducts inconspicuous.
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