Q. macrocarpa
Q. rubra
Q. alba
Q alba
On Quercus macrocarpa
found it on the ground unattached ... squares are 5mm x 5mm.
on Quercus alba
Early stages
On white oak group species
Q. stellata
galls on a white oak. not 100% sure on this ID, but this seems to be the best match visually. pics 1 and 2 are of the abaxial surface of the leaf, pics 3 and 4 are of the upper surface
Bur oak
https://www.gallformers.org/gall/571
Host tree Bur Oak
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