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very hard. 1-1.5 cm across.
oak leaf. Cades Cove, Great Smoky Mountains NP
yes, I see. Thanks, Tom.
It's most likely the Oak Pea Gall. http://bugguide.net/node/view/357968
It was white oak - so, Acraspis erinacei?
This is a Cynipid wasp gall in the genus Acrapsis. The host plant is important in determining the species. http://bugguide.net/node/view/230315/bgi...
Spotted on Dec 21, 2013 Submitted on Dec 22, 2013
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