Answer
This is tree slime, and as you may have guessed from the way we worded the question, the grape vine is a primary factor here. The photo shows grape vine sap that has dripped onto the stump, where a combination of yeast and fungi from the genus Fusicolla has colonized the sap. One common species in this genus is Fusicolla merismoides, also known as “deer vomit.”
This week’s contest winner was Ann Basehore