Red, green, and sour grapes: They’ve got nothing on the Concord grape, America’s most mysterious fruit.

This is part of Fruit Loot, which is taking a look at the strange and surprising links between fruit and money. Concord grapes are rarely seen in grocery stores, but even if you’re not familiar with the name, you definitely know the taste—at least if you grew up in the U.S. It’s the source of flavor in grape bubblegum and Kool-Aid, the grape traditionally used to make the jelly in peanut butter and jelly sandwiches, and the grape of Welch’s grape juice. It was the country’s first unfermented fruit juice—a big deal, as it allowed bottles of fruit juice to stay on shelves without fermenting into alcohol—and many of the first orders went to churches If you’ve ever tasted Concord grapes, they were likely in the form of juice or another of Welch’s Concord-based inventions: grape jelly. And while there are people who love the sweet, bold, and slightly musky taste of Concord wine, Bates says, “it’s almost like they’re ashamed to say it.” Thus, the order of grapes we know today fell into place: Grocery stores became the domain of the more robust green and red table grapes, European grapes came to dominate the vineyards, and Concords became the stuff of juices and jams. I’m not quite sure when Concord grapes and their hybrids first came to Korea, though records show that throughout the early-to-mid-20th century, the country imported a number of different American, European, and Japanese grape cultivars.