Here is a plant given to me by a friend at a botanical garden. Acer pseudosieboldianum, a.k.a. Korean Maple or Purplebloom Maple. It was labeled Acer tegmentosum-Manchu Maple. I went along with that for awhile but as I read and researched this and other maples I decided that it was Acer sieboldianum. I contacted the nursery that produced it and they said that they produce A. pseudosieboldianum but don't produce A. sieboldianum, therefore I am now sure that it is the species pseudosieboldianum.