Young gall of gall wasp (Biorhiza pallida) on oak (Quercus robur). Formed after the wasp lays eggs inside leaf #266273716
Description
Young gall of gall wasp (Biorhiza pallida) on English oak (Quercus robur). Formed after the wasp lays eggs inside leaf buds and the plant tissues swell as the larvae of the gall wasp develop inside