According to Buchholz & Buchholz (http://www.buchholznursery.com/plant_page.html?id=26c747) "Acer palmatum 'Ueno yatsubusa' is a dwarf deciduous shrub with a dense bushy form. Small five-lobed leaves emerge yellow-orange in early spring. Winter stems are yellow-orange as well. Prefers sun/partial shade in well-drained soil. 7' tall x 6' wide in 10 years. Hardy to -10 degrees. USDA zone 6." I got one mine from Charlie at amazingmaples. Edit: added photos. I may try to get some better pictures this weekend. If I do, I'll swap them out. I couldn't find much information on this cultivar, other than the blurb above from B&B, this thread http://www.botanicalgarden.ubc.ca/forums/showthread.php?t=11122&highlight=ueno+yatsubusa, and this one http://www.botanicalgarden.ubc.ca/forums/showthread.php?t=2819&highlight=ueno+yatsubusa. Those threads gave me the impression that this is an old cultivar. In my Vertrees 3rd ed the name alone is listed in Appendix D. To those with the 4th ed, any more information? When I talked with Charlie about the tree, his recollection was that this tree leafed out a few days earlier than his Katsura, which I found very interesting. When I brought it home (to a different microclimate) and compared it to my Katsura and Ueno yama I noticed that this tree is currently displaying much more orange. Additionally, my Katsura and Ueno yama both seem further along in leaf development and have already taken on a lime cast. But that could be due to the large evergreens around my property that make my brightest locations slightly shady.