@Dennis,
@DogsNDaylilies
Try this: Go to the "Daylily Data Base", type in the name of a cultivar you want to find.
Then notice at the top just below where it says who has and who wants the plant, it will say "Data specific to Daylilies (Edit)" That block of questions will pertain to daylilies. So if you will limit your searches to just the items in that block when you go back to the "Search by characteristics (height, bloom color, etc)" you should get results much more related to just daylilies.