Pin oak bark growth
I have large pin oaks across the front of my yard. They enjoy direct sun and abut the street. Recently, while picking up twig size branches, I noted an unusual growth. It resembles a smashed grape . Dark in color. Seems to arise in clumps. What is it? Should I be concerned? Is any action recommended? Photo attached
This is a natural occurrence and nothing to worry about.
It is a type of jelly fungus, now dried, which grows on dead wood when conditions are right.
There is nothing you need to do.