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.
The plant-feeding gall midges of North America
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Larva in swollen stem...Lasioptera sp.
Adults were reared from stems in August. Host: C. proteanum [Syn: C. occidentale per POWO]. Dist.: California.
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value c-occidentale-swollen-stem on iNaturalist. You can view them here: