Our ID Notes may contain important tips necessary for distinguishing this gall from similar galls and/or important information about the taxonomic status of this gall inducer.
Cynipid galls of the southwest
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Quercus reticulata [rugosa], gambelii
Acorn galls
Globular, green, on side of acorn cup in July. Fig 11.
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value q-rugosa-acorn-cup-gall on iNaturalist. You can view them here: