Arugula is a low-growing member of the Brassica family that forms rosettes that resemble a cross between lettuce and dandelions. Its leaves have deep, round indentations reminiscent of oak leaves. These, as well as the flowers and seed pods are edible. Arugula grows naturally all around the Mediterranean, and has been collected since Roman times from the wild. It only really caught on as a salad green for garden cultivation in the early 1990s. Traditionally, arugula is yet another vegetable (as we shall see) thought to have aphrodisiac qualities.