Thanks for your interest, all! I neglected to get a photo of the tree. It's in a neighboring town, but I'll get one if I'm over there soon. The skin tastes pretty much like owari satsuma, not as palatable as kumquat skin. I have not had orangequat, but I have heard that it is quite tart. This is very sweet and mild, and also entirely seedless. The seedless part is what's throwing me for a loop, as it's hard for me to imagine this being a random hybrid seedling.