<P> The' Pink Pearl' apple is a purple - 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 . </P> <P> 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 introduce 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, named it' Pink Pearl', and featured it in his 1945 catalog . </P> <P>' 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 . </P> <P> 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 Jansen of Ontario, Canada, but Jansen did not patent the name and it was subsequently taken over for a quite different Australian apple, forcing Jansen to change the name of his own apple . </P>

What is the inside of the apple called