Ciboria batschiana - Sporocarrier in youthful plate-shaped, quickly spreads flat, up to 1.5 cm wide. It is dark gray-brown, smooth on the inside. Stem usually short (1cm or more), deeply embedded in the ground, bent, black and extended at the top. It is quite rare in Poland.
Sometimes in large clusters, only on old oaks, which fungus mummies on black nuggets.

Inedible mushroom