I saw an article proclaiming the United States only has 3 native fruits: blueberries, cranberries and Concord grapes. Wrong! First there’s that whole fruit vs vegetable discussion (tomatoes and peppers are fruits, by the way) and there are plenty of other fruits. Okay. Maybe not commercial successes... but it's a decent list.
While we do have wild grape (buckshot sized and super tart), the Concord Grape is a hybridized plant.