American wine has been produced for over 300 years. Today, wine production is undertaken in all fifty states, with California producing 89 percent of all US wine. The United States is the fourth-largest wine producing country in the world, after Italy, Spain, and France.The North American continent is home to several native species of grape, including Vitis labrusca, Vitis riparia, Vitis rotundifolia, and Vitis vulpina. But the wine-making industry is based on the cultivation of the European Vitis vinifera, which was introduced by European settlers. With more than 1,100,000 acres (4,500 km2) under vine, the United States is the sixth-most planted country in the world, after France, Italy, Spain, China, and Turkey.