Phellodon confluens

Phellodon confluens, commonly known as the fused cork hydnum, is a species of tooth fungus in the family Bankeraceae. The fungus produces firm, corky fruit bodies with caps that are initially whitish grey before darkening to brown or black with age, and these caps often fuse together to form clusters. Its underside features small tooth-like spines rather than gills or pores, which are white to pale grey in colour. The species has a northern hemisphere distribution, found in forested areas of Asia, Europe, and North America, typically associated with oak trees....read more on Wikipedia.