Quercus kelloggii
Leaf galls, integral
Globular, hollow with a free-rolling larval cell inside. May.
- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=67&skin=2021