Annual, 20-50 cm tall, sometimes prostrate, glabrous, branched. Stems 1 or more from the base. Leaves 3-4-pinnately divided; segments filiform to linear; leaf bases sheathing; the sheath white margined. Bracts and bractlets lacking Umbels sessile to shortly pedunculate. Rays 1-5. Fruit ovoid to suborbicular, 1.5 mm long, 1.2 mm broad, glabrous; ridges prominent; furrows 1-vittate.