Adam's Apples

It's no trick of the light. This yellow-green apple (a French cider apple with a familiar name) really does present a two-toned face to the world. The lower left two-thirds is distinctly darker, with a jagged but clear boundary. That darker area has a curious translucent quality, as though the apple were a sponge that had been partially moistened. What is going on?

Watercore in a Lady Apple.  ¶  Eat enough apples and you are sure to encounter watercore : strangely translucent, glassy flesh super-saturated with juice and sugar.  ¶  You'd think juiciness would be a straightforward trait specific to each apple variety.  ¶  Coarse-grained apples, with large cells, hold more juice than fine-grained, smaller-cell breeds. Watermelon vs potato. Sometimes however things get a little haywire and the tree forces water, tree-sap really, into the apple so fast that some of it ends up between the cells.