Based on the image, the mushroom appears to be a type of honey mushroom, likely the ringless honey mushroom (Desarmillaria tabescens).

These mushrooms are parasitic and/or saprobic, growing on the roots of hardwood trees, particularly oaks.

They are called "ringless" because they lack the annulus (ring) on their stem that is characteristic of other honey mushroom species.

Ringless honey mushrooms typically grow in large clusters from a central mass of mycelium just below the ground.