Cucumber Tree - Magnolia acuminata
I have to put this tree on, simply because they are incredible plants nobody knows about. They
grow in the woods and on the riverbanks in Tennessee.  I grew a seedling for several years just for
the juvenile leaves.  The leaves are large and make a perfect circle.  The pictures below are from
my neighbors tree.
The blooms are large and white, don't
last but a day or two.