Hillside along a village street., Cook County, Illinois, USA September 9, 2008
Growing about eye level on the twig of a small Swamp White Oak, Quercus bicolor. More galls were noted higher up in another nearby tree of about the same size. The texture of the galls is leathery, but firm.
Contributed by Yokabachi on 10 September, 2008 - 4:01pm Last updated 15 September, 2008 - 4:34pm
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