The American Hemerocallis Society
This is a great site to visit for information about Daylilies and the society.

Tinker's Gardens
This site contains a Daylily database that contains information such as cultivar and hybridizer.
Also has a forum to assist gardeners.

The American Peony Society
This site contains information about Peonies and the society

Carsten Burkhardt's Peony Database
This site contains a Peony database with a plethora of information.