DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY
King Alfred's Cakes (Daldinia concentrica). Fungal infection of the trunk of an ash tree (Fraxinus excelsior) with Daldinia concentrica. Also known as King Alfred's cakes, cramp balls, or coal fungus, this inedible fungus lives on dead or decaying wood, especially ash. Photographed in the UK.
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