abnormal structure acorn oak tree quercus family called knopper gall

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Abnormal structure on acorn of oak tree Quercus family called Acorn Knopper Gall Royalty Free Stock Photo
Abnormal structure on acorn of oak tree Quercus family called Acorn Knopper Gall Royalty Free Stock Photo
Abnormal structure on acorn of oak tree Quercus family called Acorn Knopper Gall Royalty Free Stock Photo
   
   
   
   
Abnormal structure on acorn of oak tree Quercus family called Acorn Knopper Gall
   
   
   
   
   
   
   
Abnormal structure on acorn of oak tree Quercus family called Acorn Knopper Gall, caused by gall wasp insect Andricus quercuscalicis, held in left hand.

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