What internal flesh color distinguishes the European wild bilberry (Vaccinium myrtillus) from American blueberries?
Answer
Deep red or purple
The defining visual characteristic used to separate bilberries from blueberries upon slicing them open is the color of the internal flesh. European wild bilberries possess flesh that displays a deep red or purple coloration. This dramatic difference in internal pigment directly corresponds to the berry's higher concentration of potent flavonoid pigments known as anthocyanins. Conversely, American blueberries, despite their dark exterior skin, reveal a comparatively pale, greenish-white flesh beneath their surface. This internal difference is a fundamental biological distinction linked to the varying chemical compositions of the two species, particularly regarding their antioxidant load.
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