Spring hazelcup fungus (Encoelia furfuracea) together with birch blackhead (Diatrypella favacea) on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
Birch blackhead (Diatrypella favacea) growing through bark on a dry hazelnut on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
Pattern of birch blackhead (Diatrypella favacea) on a dry hazelnut on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021
Close-up of birch blackhead (Diatrypella favacea) on a dry hazelnut on Orekhovaya Gora Hill in Duderhof Heights, south from Saint Petersburg. Russia, May 9, 2021