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
“
An abrupt swelling of stems at the base of new growth. Hairless, dark red, thick-walled. Leaves branch off the gall and seem to grow normally. Observed in Minnesota in June. No larvae or chambers apparent but likely midge-induced based on comparable galls.
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value p-tremuloides-club-gall on iNaturalist. You can view them here: