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Galls? Tree disease? A normal occurrence? Does anyone know what these growths are?
They are on a Laurel Oak, I believe, or a similar species of thin-leafed oak.
If they are caused by insects, like gall wasps, I will change category to Arthropods, but I can't say I've seen these particular growths before. If they are not, I will remove them from such categories, etc.
Spotted on Sep 16, 2019
Submitted on Sep 25, 2019