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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Leafy-gall midge
Unknown Pl. 455
This midge induces large, polythalamous bud galls on gumweed (Grindelia hirsutula).
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value g-hirsutula-leafy-gall on iNaturalist. You can view them here: