Ash leaf gall

Ash leaf gall

Observation - Ash leaf gall - UK and Ireland. Description: On edge of ash leaf. Seemed to be the only affected leaf on this tree. Question - should leaf galls be put up as Plants or Invertebrates?

On edge of ash leaf. Seemed to be the only affected leaf on this tree.
Question - should leaf galls be put up as Plants or Invertebrates?