Happy Arbor Day! Can you identify these trees at Heritage from their bark?

As a member of the Tea family, I come from Asia, a medium tree with many trunks.  I'm adorned with simply serrate green leaves in spring, and don a sea of white flowers in summer.  You can find me in the Labyrinth.  Who am I? 

I am one of the few trees endemic to southeastern North America. Bees love the nectar from my drooping, fragrant white flowers. I can grow to be very old and tall, and you can't miss the fiery red of my leaves in Autumn. You can find me near the Daylily Garden. Who am I?  

I am native to eastern North America and an abundant canopy species.  You might say I look funny due to my irregular branching habit.  My evergreen needles are in groups of three.  Early colonists used my wood to produce turpentine and tar, and I thrive in areas that have been burned by fire.  Who am I?   

I am a sturdy and imposing presence in the landscape.  Reaching tall, and wide with low branches.  I have long point buds and I produce edible, triangular nuts that wildlife especially love!  I keep my smooth gray bark as I age, and unfortunately humans love to carve into my trunk.  Who am I?

I am popular all over the world for my exfoliating bark.  Originally from Asia, I have many cousins native to North America.  My fruits are winged like helicopters and my leaves have three separate leaflets with woolly undersides.  You can find me next to the Arts and Carousel building.  Who am I?