a picture of woody mushrooms growing from below on the trunk of a birch.

nature tree wood autumn brown fall forest fungus natural plant beauty mushroom closeup green white wild backgrounds bark botany environment leaf landscape season baarn basidiomycota bearded hedgehog tooth beech common edible european fagus sylvatica flora hericium erinaceus holland lage vuursche lions mane medicinal netherlands pom rare satyrs beard cavity utrechtse heuvelrug abstract biology birch blossom