Debra and Vickie - Thank you!
I honestly don't know any hybridizers who grow daylilies in my zone (10a). I think the intense heat and temps play a big part in the issue of keeping them alive for more than a few years. I will say though, that I still have some that have not disappeared. They have yet to become clumps, but they do typically bloom every year. Some are actually registered and name cultivars that I obtained and some are crosses that I purchased as seeds or my own crosses from what I had growing in my garden at the time. I am amazed that they haven't disappeared yet after 5+ years. And they seem to be rust resistant. But there aren't many of them (less than a dozen). I seem to have better luck with miniature blooming daylilies than those beautiful large bloomers.
If anyone grows daylilies in zone 10a, I'd sure love to hear from you!
And in keeping with this thread and my love of Dragonfly Dawn (DD), here is a pedigree chart for 4 children from a DD x DD cross seeds that I managed to get my hands on. (This is a repeat of a chart I posted years ago.):
The blooms were stunning to me at the time and the photos in the chart don't do them justice. DD is still my favorite parent, but it doesn't like Zone 10a, as none of them survived past 3 years.