Innhullet

Innhullet is a natural phenomenon observed in certain types of wood, particularly in deciduous trees like oak and beech. It refers to a hollow or cavity that forms within the trunk or branches of a living tree. These hollows are not caused by disease but rather by a process of decay that begins at the center of the wood and progresses outwards.

The formation of an innhullet typically starts with an injury to the tree, such as a broken branch, lightning strike, or insect damage. This wound allows fungi and bacteria to enter the wood and begin the decomposition process. Over time, the dead wood at the core of the tree is slowly consumed, creating an internal cavity. The outer layers of the tree, including the bark and cambium, usually remain alive and continue to grow, effectively enclosing the hollow.

Innhullet can vary significantly in size and shape, from small cavities to large, extensive hollows that can encompass a substantial portion of the tree's interior. The presence of an innhullet does not necessarily mean the tree is unhealthy or unstable. In fact, many trees with significant hollows can live for decades or even centuries. These hollows can provide important habitats for various wildlife, including birds, insects, and small mammals, offering shelter and nesting sites. In some cultural contexts, trees with innhullet have held symbolic significance, often associated with age, wisdom, or hidden depths.