What are the adaptations of an oak tree in a temperate deciduous forest?

In the deciduous forest there are many flowers like the passion berry and the blue lily. There are many other flowers but those are some of the main ones.

The Deciduous forest does not have much vegetation but there are many trees that contain outrageous amounts of flowers. Animals need these trees because they provide shelter and some use them for food and even water from the leaves. The trees adapt to this forest by having thick bark barriers on the trees to keep the animals out and the trees from dying.