Daldinia concentrica

Inedible mushroom. Daldinia concentrica is known by several common names, including King Alfred's cake, cramp ball, and coal mushroom. It is a common and widespread saprotrophic sac fungus that lives on dead and decaying wood.
source

source	iNaturalist is a citizen science platform and online social network that allows users to record and share observations about biodiversity, as well as assist in species identification. The platform allows users to upload photos or videos of plants, animals, and other organisms, which can then be identified by a community of other users. In addition, iNaturalist also has an automatic identification feature that uses computer vision to help identify species.