Broccoli and cauliflower are two related plants in the brassica genus, or the cabbage family. The flowering head, stalk, and leaves are edible, though it’s less common to eat the stalk of cauliflower or the leaves of either. Where the florets (flowering heads) of broccoli are usually dark green, cauliflower is usually white, though both are arranged in a tree-like structure. Both can be eaten either raw or cooked.