Every year, lovers of tart, juicy huckleberries trek into the forests of the Northwest to pick them at great effort. No one's managed to grow them commercially just yet, but their fans keep trying.
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Marionberry fruit photographed at the National Centre for Organic Gardening, which has been the headquarters of the Henry Doubleday Research Association since the early 1980s.
Michael Boys/Corbis/VCG/Getty Images
Farmers harvest cranberries born from the University of Wisconsin-Madison's breeding program. The program has created a couple commercial varieties since it's inception.
Jeff Miller/University of Wisconsin-Madison