American Hemerocallis Society

The American Hemerocallis Society, Inc. (AHS) is a non-profit organization. The AHS is organized exclusively for educational and scientific purposes, and especially to promote, encourage, and foster the development and improvement of the genus Hemerocallis and public interest therein.
Read about the AHS and its benefits on their website at About the AHS.
The AHS website has an enormous amount of information about daylilies and the daylily world including an online database of nearly 70,000 registered cultivars.
Membership information can be found at AHS Membership.