Trees are a big deal on the University of Oregon campus in Eugene.The UO even has a tree walk outlined on its website. Curious students or visitors are directed to several trees of interest on campus, including the “moon tree.” It’s a Douglas Fir raised from a seed that circled the moon in 1971. Another highlight: a “legacy” white oak near the theater complex. It’s the sole remaining tree that was growing when the university was founded in 1876.…