Oregano (Origanum vulgare) is the Italian and Spanish common name for Wild marjoram. It is a beautiful perennial which grows into a leafy bush about 2 1/2 to 3 feet high. Oregano may be used in all the ways in which sweet marjoram is utilized. But since its flavor is stronger than that of the sweet variety, it should be apportioned carefully to individual tastes. The herb, either fresh or dried, has a wonderful effect upon the flavor of tomato or bean soup when a small sprig or a half teaspoon is added to the ingredients. Oregano is also used to flavor sausages; and when broiling or roasting pork or lamb, a sweet pungency is added to the flavor. Poultry, game, sauces, and vegetables are all more delicious when a touch of oregano has been added.

Source: Miloradovich, Milo (1950). Cooking with Herbs and Spices. New York: Dover; pp. 62-63.