I din't think it was SG either after getting another look at my picture. SG has a much more defined eye zone. Oh well, I tried.
I would dance too if it was one of my seedling. It's a beautiful thing and I hope you find out what it is. I've got a few seedlings this year that I'm just sure, a seed dropped in their pot and when I divided them last year they bloom for the first time this year. I've got a cross of Victorian Lace x Boundless beauty that had some of the prettiest purple blooms. REally purple. So, I really think I have more unknowns than I thought!!!
Sometimes the truth is not ever known in the daylily world. We have way too many things that can happen. That's what makes our babies and the quest for more babies so much fun.