maryjane.
You can add a new entry to the database by going to the link on the side column, Plant Database. There you will find a link to add the new entry.
http://garden.org/plants/
There is a parent database for unnamed plants, it can be found in the 'Browse by genus' list and will be at the top of the list for each genus there is a parent database for, here's the one for Hemerocallis ..
Daylilies (Hemerocallis)
Alternatively you can use the search box in the database, but for me searching for Hemerocallis doesn't bring up the parent page at the top.
