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Quercus macrocarpa
This tree forms a very thick bark - resistant to fire and has gnarled branches.
Grows across the Minnesota area into the prairie and savanna.
This tree is slow growing and these young leaves look a bit different than the leaves that grow later in the season.
Thanks Carolina!
I figured they were disabled right as I posted it, ha! But with no way to edit the comment, I resigned to looking the n00b for all time.
Hi Tamashii!
HTML comments are disabled, I'm writing your link again so people would be able to see it.
http://en.wikipedia.org/wiki/Quercus_mac...
I concur that it is likely the leaf of a bur oak: <a href="http://en.wikipedia.org/wiki/Quercus_macrocarpa">Quercus macrocarpa</a>.
I'd suggest that it is a bur oak (Quercus macrocarpa), based upon its location, although there are lots of exotic tree species in the Minneapolis, MN area. The ridged, squarish twigs and the leaf's deeply cut "waist" point to bur oak. The leaves certainly do bear some resemblance to an English oak, however.