1. 

   Junglekeeper Esteemed Contributor 10 Years

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   Guinness record for largest oak leaf held by Ont. boy.​

   According to Guinness World Records,

    

   Junglekeeper, Aug 17, 2011

   #1
2. 

   Michael F Paragon of Plants Forums Moderator 10 Years

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   Britain zone 8/9

   Another piece of poor research from Guinness. Quercus dentata leaves regularly reach this size and larger.
   
   The leaf in the link photo is Northern Red Oak Quercus rubra.

    

   Michael F, Aug 18, 2011

   #2

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