Quercus dumosa
Leaf galls, detachable
Ellipsoid, on upper side, greenish with raised purple spots, 1.6 mm in dia.
- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=64&skin=2021