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Some kind of disease or pest affecting maple leaves.
Thanks man! Yeah, figured it was insect-related. See them all the time.
I did a quick google search, and i found that its a gall caused by a mite. http://www.thunderbay.ca/Living/Environm...
I see those all the time on a variety of leafs. I've always wondered what it was; I just assumed it was some kind of fungus.
Spotted on Jun 29, 2014 Submitted on Jul 14, 2014
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