I looked up Liquidambar styraciflua ‘Rotundiloba’ or Roundleaf Sweetgum in Dr. Mike Dirr's Woody Plant Manual and Ted's tree is indeed rotundiloba. It is very much a native and was discovered in 1930 in North Carolina. Dr. Dirr mentions that he has never seen any in abundance and are somewhat of a rare find in nature. There is one he writes about on the NC State campus. Not many people have had the privilege of seeing one of these.