the tree in my yard is oozing a clear jello like substance? Never did it before..There is a lot by the base & more coming out of the bark? I think it is an old cherry tree.
It is sap coagulating into the gel due to some kind of wound or disease that has damaged the bark of the tree. More here: http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/diseases/cankers/gummosis-of-fruit-trees.aspx