Bur Oak
Quercus macrocarpa
Notes:

According to Bringing Nature Home(see Resources page), oaks provide more value than any other plant.

In this yard, the oak might grow faster if it got more sunshine. But it seems to be doing ok.

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It really boils down to this: that all life is interrelated. We are all caught in an inescapable network of mutuality, tied into a single garment of destiny. Whatever affects one destiny, affects all indirectly.
Martin Luther King, Jr.