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Found on staghorn sumac. It had killed the leaf
It looks like a type of gall which are caused by aphids. At this time of year, they don't do any harm to the plant and are a food supply for birds in the winter.
Spotted on Sep 7, 2013 Submitted on Sep 7, 2013
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It looks like a type of gall which are caused by aphids. At this time of year, they don't do any harm to the plant and are a food supply for birds in the winter.