Beech wood wart.
Hornbeam and other broadleaved tree species.
Found fruiting usually on stems and larger branches - often on fallen trees.
Hard. Individually small and hemispherical (rounded) but often in larger clusters. Beginning greyish and developing to a rusty brown to black. Pimpled like a strawberry. Flesh black.
Considered saprotrophic. Indicative of dysfunctional areas on standing trees.