A selection of distorted growths or Galls found on Pedunculate Oak Quercus robur trees, caused by a variety of Gall Wasps which lay eggs within leaf buds or the leaves.
Oak Artichoke Gall Andricus fecundator
Oak Common Spangle Gall Neuroterus quercusbaccarum
Oak Marble Gall Andricus kollari
Oak Knopper Gall Andricus quercuscalicis