Quercus engelmanni
Leaf galls, integral
Spherical, dia 5 mm, projecting on both sides of leaf. Like Fig 104.
- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=65&skin=2021