Quercus chrysolepis
Leaf galls, separable from leaf intact
Crenate spangle, on under side, dia 2 mm. Fig 96.
Fig. 96. A midrib cluster. Q.chrysolepis. Those collected May to November have been empty.
”- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=83