Hemerocallis, the daylily

Daylilies have become increasingly popular among perennial gardeners in recent years. This popularitiy is due in large measure to the striking new hybrids and cultivars that have been developed by dedicated daylily breeders. It includes accounts of the work of daylily breeders from 1900 to the present day, as well as the history of the American Hemerocallis Soceity with its rules or judging daylilies..."--Publisher description.