Jackrogersella multiformis, also called Hypoxylon multiforme, commonly known as the birch woodwart

Hypoxylon multiforme, also called Jackrogersella multiformis, commonly known as the birch woodwart, fungus from Finland

AnnulohypoxylonAnnulohypoxylon multiformeBirch WoodwartFinlandHypoxylon multiformeJackrogersellaJackrogersella multiformisascomyceteascomycetesdeadwoodfungifungushypoxylonkoivunsyylälogmultiformemultiformismushroommushroomssyyläwartywoodwart