The bloom size changes very little over the life of a daylily if grown with TLC. I only post the bloom size for the benefit of the ones looking at the photo, chances are it will pretty close to that size ten years from now.
There are more and more hybridizer's using (seedling x seedling) than ever before, most of them do not keep up with what they cross, I can see a lost tag ever now and then but when half of a persons introductions have no name of a pod or pollen parent or both it's not their big secret, they just don't know because they don't care. Jan Joiner did a program for one of our Regional Meetings and said she didn't have time to record such data, needless to say I buy no Joiner daylilies.