It is the cross-section of a tree trunk or the tree grain patterns found on tree stumps.

If you are creating a large tree log, this texture may help you fill the ends of your timber.

It is a waxy tree trunk. Therefore, its bark has a layer of glossy coating.

If you are building a forest, this texture may increase your tree variations.

It is a realistic pine tree trunk texture. The tree bark has some peeling effect.

If you are creating natural environment, don't miss this texture.

It is a stylised pine tree trunk texture. The tree bark has the peeling effect.

If you are creating a stylised tree, these PBR maps may suit your need.