Location: upper leaf, lower leaf, between leaf veins
Form: leaf blister
Cells: not applicable
Possible Range:i
Common Name(s):
Synonymy:
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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.
Gallformers ID Notes
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A small leaf blister causing a distinct raised cup, green or red in color, on the upper side of leaves of Physocarpus opulifolius, with white material on the underside (unclear if this is erineum or powdery mildew or something else). Observed in July-August.
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value p-opulifolius-leaf-blister on iNaturalist. You can view them here: