Platanus orientalis. Sycamore. The fruit of the tree is patched. Green balls. Summer. Flowering of trees. Backdrop of sky and tree. Leaves of trees. Photos | Adobe Stock
Sebastopol's mysterious balls of leaves solved. It's mistletoe
What's up with the trees with balls of leaves around the area? : r/Charleston
Which Trees Produce Spiky Round Balls? Here's How to Identify Them
Oak Galls and Mistletoe: Nature's Decorations - The Real Dirt Blog - ANR Blogs