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Some kind of fungus or desease on an oak tree.
It is a gall of some sort. ID the tree and you'll likely ID the critter. It looks like it might be a horned oak gall. Wasp is or was inside.
Ya, seems like a gall rust...as seen often in pine branches
Spotted on Feb 6, 2012 Submitted on Feb 6, 2012
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It is a gall of some sort. ID the tree and you'll likely ID the critter. It looks like it might be a horned oak gall. Wasp is or was inside.
Ya, seems like a gall rust...as seen often in pine branches