The Donut Fungus (Donutia officinalis) is a very rare species that grows on a birch, but only after snowfall !!
It is served as a very tasty snack in the forest café (see picture below) fresh from the tree on your plate with lots of whipped cream.
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Just kidding of course.
It’s a Birch Polypore, a theoretically edible fungus, but with an unpalatable bitter taste.
Dutch name : Berkenzwam
German name : Birkenporling
Latin name : Piptoporus betulinus
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