This is a beautifully shaped tree: it usually has a dome-shaped crown with cascading branches. I understand it's an old Japanese favorite. The spring leaves are purple/red with green undersides and in the autumn the leaves go red. It's especially interesting to photograph this tree with backlighting, as in this photo, which was taken May 4, 2007 in filtered light from a canopy of Madrone trees. It is my understanding that this cultivar goes by many names, some of which are "Oh shiu shidare," "Oh siu shidare" and "Oh syu shidare."