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 eastern United States
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Quercus chapmani
Acorn galls
A pip gall in acorn cup beside the acorn in the fall. Never reared.
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value q-chapmanii-pip-gall on iNaturalist. You can view them here: