Reason I think it cannot be a seed from ditch lily x Stella... Ditch lily is known as being pretty infertile. It increases by stoleniferous roots. Stella is very fertile, but usually has babies that look just like Stella.
I once thought I had a seedling come up in an aisle. We called it Aisleway Beauty as a joke. That is until I looked at a set of old bed maps, and realized it looked just like One More Heartache, which was planted 6" away a few years before. I took a bloom to OMH hybridizers and compared it...sure enough, it was identical. That was the only time I have thought I had a seed start up on its own. Does not normally happen. Guess when I dug OMH I must have dropped a bit of root, it got covered up, and grew.
