Also known as purple cabbage , red cabbage, red cabbage, commonly known as purple cabbage , a variety of Brassica oleracea and Brassica spp. It is a type of cabbage. It is named because its outer leaves and leaf balls are purple-red. Purple cabbage , also known as purple round cabbage , purple leaves, leaves with wax, leaves the ball nearly circular. Rich in nutrition, especially rich in vitamin C, V and more vitamin E and B family.