I know nothing about Daylilies but I'm curious about the answer to your question too. I googled and found this: http://www.daylilies.org/Whatl... but not knowing anything about hybridization etc. it's hard for me to understand so I'm not sure if it's the same thing you are talking about.
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!