Commented: What is this stuff growing on my tree?It's a species of Exidia , perhaps the Amber Jelly fungus (Exidia recisa). It just feeds on branches that are already dead, it's normal to see these from time to time during wet rainy times on old dea...
Commented: suggestions for 25' to 30' deciduous treeMost commonly sold Mountain Ash trees (Sorbus spp.) can have a lot of issues: Most Mountain Ash trees are not heat or drought tolerant, Most are very susceptible to fire blight disease, stem cankers, ...
