Quercus dumosa
Acorn galls
Star-shaped "pip" gall on young acorns. Fig 41.
Quercus lobata
Acorn galls
Globular "pip" gall with a crater at apex, 3.8 mm in dia, green, covered with short dense pubescence. Fig 188. Seen once Oct 27 & empty.
Fig 188. Unknown. Cell occupies whole interior of acorn of Q. lobata at Chico, Calif. on Oct. 18 when the nutritive layer was not yet used up. Diameter 5.7 mm.
”- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=80