I would like to identify this Japanese Maple. I believe that it is a cultivar. I grafted it several years back from wood gathered at a local community college's collection of small trees planted out in full sun. I doubt if any at that site have survived. I will go back sometime and investigate. I have it labeled "Shidare?". I don't think it is 'Oshu shidare' although I need to get that cultivar. The leaves average 7cm long and 9cm wide. They have 7 lobes divided about 3/4 of the way from tip to base. They are finely serrated and have a truncate base. The undersides are glabrous, dull green and shiny. the upper surface is now predominantly a dull purple with a prominent green mid-rib. Some leaves show a green under tone but overall it is predominantly purple. I believe that as the season progresses it's color changes to a dark and subtle green tone. Petioles average about 2.5cm or less. I am leaning toward 'Tsukuba ne' but have doubts about that cultivar coming into the college's collection. What do you think?