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Oak apple galls on the stem of Pedunculate or Common Oak (Quercus robur). These are probably caused by the sexual generation lava of the gall wasp Biorhiza pallida. Bedgebury Forest, Kent, UK. 14 May 2006
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. These are probably caused by the sexual generation lava of the gall wasp Biorhiza pallida. Bedgebury Forest, Kent, UK. 14 May 2006){kind=link}