What is the function of the pith in a tree?
The pith of a tree is formed during the first year of growth and becomes a storage area for impurities that are deposited from the active xylem during the growth of the tree. The pith or “hart wood” is more resistant to rot and was used for the base of log cabins before foundations. The center of the tree has also been sought ofter for fence posts due to the resistance to rot.