Pink Pearl (apple)
The Pink Pearl apple is a pink-fleshed apple cultivar developed in 1944 by Albert Etter, a northern California breeder. It is a seedling of 'Surprise', another pink-fleshed apple that is believed to be a descendant of Malus niedzwetskyana.
In 1940, after many years of work on breeding red-fleshed apples, Etter set up a partnership with George Roeding Jr.'s California Nursery Company, one of the goals of which was to introduced some of Etter's Surprise-derived cultivars to the public. Eventually Roeding settled on test seedling #39, which apparently impressed him with its looks (translucent skin, medium size, and tapered shape), its tart-sweet flavor, and its late-summer ripening date. He secured U.S. plant patent 723 for it on Etter's behalf, christened it Pink Pearl, and featured it in his 1945 catalog. 
Pink Pearl apples are generally medium sized, with a conical shape. They are named for the color of their flesh, which is a bright rosy pink sometimes streaked or mottled with white. They have a translucent, yellow-green skin, and a crisp, juicy flesh with tart to sweet-tart taste. Pink Pearl apples ripen in late August to mid-September. It is susceptible to scab, and the fruit tend not to keep well on the tree once ripe.
Among Pink Pearl's descendants is Pink Princess, a carmine-striped apple with pink to dark pink flesh. It was originally named Pink Lady by its developer, Fred Janson of Ontario, Canada, but Janson did not patent the name and it was subsequently taken over for a quite different Australian apple, forcing Janson to change the name of his own apple.
- "The Ettersburg Apple Legacies", Greenmantle Nursery website.
- Burford, Tom. Apples of North America: Exceptional Varieties for Gardeners, Growers, and Cooks. Timber Press 2013.
- Fishman, Ram. "Albert Etter and the Pink-Fleshed Daughters of Surprise". CRFG Fruit Gardener May/June 1995.
- "A Grower's Experience: Red-Fleshed Apples", Sutton Elms Diversity website.
- "Red-Fleshed Apples: List of Varieties", Sutton Elms Diversity website.
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