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21 Bur Oak

(Quercus macrocarpa )

The bur oak is our most drought- and pollution-tolerant tree. A slow growing tree that stands the test of time, bur oaks commonly live to be 200 to 300 years old, and some may live up to 400 years. Many of our older giant silver maple and green ashes are being replaced with these mighty oaks, which will still be here long after we’re gone. Tree 20 on the Central Campus loop is nearly 80 years old, and freshmen who saw it planted are now nearly 100 years old.