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The Artist's Fungus (Ganoderma applanatum) is a bracket fungus with a cosmopolitan distribution.

The spore bodies are up to 30-40 cm across, hard, woody-textured, and inedible; they are white at first but soon turn dark red-brown.

It is a wood-decay fungus, using primarily dead heartwood, but also as a pathogen on live sapwood, particularly on older trees. It is a common cause of decay and death of beech and poplar, and less often of several other tree species, including alder , apple, elm, horse-chestnut , maple, oak, walnut , and willow.

A peculiarity of this fungus lies in its ability to be as a drawing medium for artists. When the surface is rubbed or scratched with a sharp implement, it changes from light to dark brown, producing visible lines and shading.

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