Unknown gall.
Quercus chrysolepis
Leaf galls, separable from leaf intact
Shallow saucer, 2.4-3.6 mm, ivory color, no cavity below larval cell. Fig 146 [sic]
Fig 140. Q. chrysolepis. On lower side of leaf. No cavity under the larval cell as in patelloides (Fig. 105).
”- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=86