Quercus chrysolepis, vacciniifolia
Leaf galls, separable from leaf intact
Small sphere, dia 1.5, surface granulate, bursting out of a crack in midrib. Fig 131.
Fig 131. Q. chrysolepis and vaccinifolia. Usually on upper surface of leaf.
”- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=86