Quercus agrifolia
Stem galls, woody stem swellings or cells under bark
Terminal or lateral, globular, green, dia 10 mm, in May. Fig 64. Mono.
Fig 64. Terminal or lateral; green , succulent, pubescent in early May (Montecito). Q. agrifolia. A Synergus emerged in April.
”- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=81