We had a long thread before on trying to tell the difference in the two that is the first I have seen mentioned about the seed. " Hemerocallis fulva 'Europa', H. fulva 'Kwanso', H. fulva 'Kwanso Variegata', H. fulva 'Kwanso Kaempfer', H. fulva var. maculata, H. fulva var. angustifolia, and H. fulva 'Flore Pleno' are all triplods that almost never produce seeds and reproduce almost solely by underground runners (stolons) and dividing groups by gardeners" That is from Wikipedia, but one of the few sources I can find about seed.
Edited to add one more source:
http://www.hemerocallis-europa...
