Cruciferous vegetables are vegetables of the family Brassicaceae (also called Cruciferae).These vegetables are widely cultivated, with many genera, species, and cultivars being raised for food production such as cauliflower, cabbage, garden cress, bok choy, broccoli, brussels sprouts and similar green leaf vegetables.ruciferous vegetables are one of the dominant food crops worldwide. They are high in vitamin C and soluble fiber and contain multiple nutrients and phytochemicals.