oak tree fruit but its not an acorn

Discussion in 'Plants: Identification' started by jhs1, Sep 13, 2006.

  1. jhs1

    jhs1 Member

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    north reading, USA
    I see these "fruits" in my back yard under a large oak tree. this is the only tree in the area but I cannot find any information about other oak fruit other than acorns. any idea what this is?
     

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    jhs1, Sep 13, 2006
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  2. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    It's a gall, caused by the larva of an insect. Cut one open, and you'll find a tiny grub inside.
     
    Michael F, Sep 13, 2006
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  3. jimmyq

    jimmyq Well-Known Member 10 Years

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    and from a tree guy's perspective... COOL. :)
     
    jimmyq, Sep 13, 2006
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  4. Weekend Gardener

    Weekend Gardener Active Member 10 Years

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    Weekend Gardener, Sep 13, 2006
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