I don’t have a name for this “gummy substance” that I spotted in a number of trees in the Iguazu Falls. I have found that quite interesting. Are these created by the environment or disease from the trees?
When mushrooms or conks, also called a bract or shelf, grow on tree bark, it is usually a sign that the tree is infected with a rot-inducing pathogen. While not all mushrooms are harmful to trees, many are. They cause heart decay, which causes healthy trees to begin to rot at the heart of the trunk.