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DescriptionAnnual, biennial or perennial herbs. Leaves entire to pinnate. Flowers small, whitish in terminal or axillary, ebracteate racemes. Sepals not saccate. Petals 4, vestigial or 0. Stamens 2, 4 or 6. Ovary 2-ovulate. Fruit a subcircular, ovate or elliptic silicula with keeled and winged valves.