Boysenberry

The boysenberry is a hybrid bramble fruit combining European raspberry, European blackberry, American dewberry, and loganberry parentage, first developed by Rudolph Boysen in California; surviving vines from his abandoned farm were rediscovered in the late 1920s by USDA scientist George Darrow and farmer Walter Knott, whose cultivation of the rescued plants became the basis of Knott's Berry Farm. The berries are large, deep maroon, soft-textured, and sweet-tart, but their thin skins bruise and leak juice so easily that most of the crop is processed into jam, pie filling, juice, syrup, and ice cream rather than sold fresh. New Zealand became the world's largest producer of boysenberries by 2016, after commercial growing in California declined from its 1950s peak.