White Oak Gall (you don’t have a picture of.)
Location: Murrysville, East of Pittsburgh, PA
October 28, 2010 4:18 pm
I took pictures of some galls on my white oak tree today (10-27-10) I couldn’t find any pictures of these either on BugGuide or on this site. They are ONLY on my white oak tree – not on any other oak tree in my yard. (Pin oaks, shingle oaks) And there are hundreds of these galls. I find it interesting that they have turned pink as the leaves have turned red, since they are made of leaf tissue. They flick off the leaf easily and are wet when squished. This tree is about 15 years old and I do not recall ever seeing these galls on it, although I have seen other types. Thought you might like these pictures for your files.
There does seem to be an infinite variety of Galls that can be found on oak trees, and we wish Alfred Kinsey were still alive and working to classify the Gall Wasps that produce these harmless growths.