Arugula is a leafy green plant that's commonly used in salad. It's fairly easy to grow arugula in a small garden.
In the U.S., this plant is usually called arugula, while in the U.K. it's more often called rocket. Many backyard gardeners like to grow arugula, which is one of the earliest plants to be harvested, since it's fairly tolerant of cold. The Latin name is Eruca sativa, but arugula comes from an Italian dialect's variation on ruchetta, the plant's name in Italy.