Tree that grew On nurse Log

The fallen trees in the forest become nurse logs, providing a place for other trees to sprout. These trees grow on top of the nurse log and can often be seen with their roots straddling the nurse log. Once the nurse log rots away, the roots remain as a frame for the now missing nurse log. As a result the tree trunk at its base is well above ground with the roots holding it firm even though they are several feet above ground.