The seeds, even though white, should be good, viable. They are missing the black pigment and that could make them quicker to dry out - so one might have to be careful about how one handles the seeds (don't let them dry out too much).
There is at least one other daylily cultivar that produces white seed and I expect that there are several that carry the characteristic but hidden. The characteristic is a pod parent one so it will not appear when the pollen from Moonlight Orchid is used. It would appear in Moon light Orchid's seeds no matter what cultivar's pollen is put on Moonlight Orchid flowers.
