A.P. Ruby Lace is a slow growing dissectum similar to Red Filigree Lace but is supposed to hold it's color better in shady conditions. Based on my research it is a fairly rare cultivar. My tree is not even a foot tall and about 2 1/2' wide. It is in a 3 gallon container and the nursery said it was almost 7 years old. It has very small leaves similar in size to Seiryu but more delicate and thin. It is a very different looking tree even next to all of my other dissectum cultivar.
It was one of the trees I picked up when I visited Mr.Maple. I think they had a couple more and this one is not listed on the website.