Arugula is a type of LEAFY green vegetable that is commonly used in salads. It is also known as rocket, rucola, rugula, and colewort. It has a slightly bitter taste and is often used as a garnish or as a salad green. ESCAROLE is a type of endive with broad, slightly bitter leaves. It is often used in soups and salads. ROMAINE lettuce is a variety of lettuce with long, crisp leaves. It is often used in Caesar salads and other dishes. LEAFY greens are any edible plants with leaves that are eaten either raw or cooked. Arugula is one of many types of LEAFY greens.