In more than 25 years of growing daylilies, I have only had one that reliably was open more than one day, Maymont Double. A friend grows Starbase Alpha (think that is the name...a Moldovan yellow). It takes days to open, and is possibly the thickest substance I have ever seen.
So cool! I doubt this was a seedling. More likely the woman gave you a fan of something accidentally dug with the ditch lily. Have you asked her if it looks familiar?
