Undetermined species
Galls less than 5 mm in diameter
Globular, pure white, bare, smooth, 1.5 mm in diameter, scattered on under side of leaf of Q alba in the fall.
- LH Weld: (1928) Cynipid Galls of the Chicago Area©
Reference: https://www.biodiversitylibrary.org/page/57505984#page/204/mode/1up