@daylilly99
Thank you for the details.
For two daylilies that both have anthocyanin coloured flowers to produce a yellow seedling both parents would typically carry two copies or more of yellow. Typically the yellow pigments(s) would be present in the flowers with the anthocyanins but hidden by them. It would tend to make the anthocyanin coloured flowers not clear - possibly muddy or drab.
If the cross had produced near-white seedlings that would be easier to explain than yellow seedlings.
The known ancestry of the registered daylilies involved does not contain yellows or near whites, creams, etc.
Is it possible that the lost parentage involved crosses with near-whites?
