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.
Plant Galls of the Western United States
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... Leaf edges roll inward, creating an extremely tight and difficult-to-open gall ...
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value o-cerasiformis-leaf-rollup on iNaturalist. You can view them here: