Might be Tree Parasites?

I saw these leaves on the parking lot when I picked up Charlie from Camp. I don’t think they are a good sign but I’m not sure. I tried to identify them. Maybe a blog reader will know.

Do you know what the bumps are under these leaves?

9 thoughts on “Might be Tree Parasites?

    • Thank you Ken. I appreciate the links. I’m glad I didn’t touch them. I’d never seen them before.

  1. My daughter Anna lives in Iowa and has these on the tree in her backyard . They are ugly for sure. She had an arborist doing some work there recently and was told these are “oak galls” and nothing to worry about. Ugly but doesn’t hurt the tree.

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