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 Insect Fauna of Ninebark, Physocarpus opulifolius (Rosaceae)
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Yellowish-green to red pea-like galls of C. (ed. Contarinia) sp. 2 were found in June on or near the midrib of the upper surface.
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value p-opulifolius-red-bead-gall on iNaturalist. You can view them here: