
OK, so I have these trees, which I think are Shumard (or Red) Oak. And back in mid-April I noticed these lime-looking growths on the leaves. Some leaves had full grown “limes” and others were just starting to show signs of “lime” growth.
The best I can determine is that the tree has blisters. But, since no one can confirm my “diagnosis” I’m turning to you for assistance. If you or someone you know is a leaf expert or botanist or just some leaf enthusiast I’d love a little help identifying this leaf disease.
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