Common Daylily, a non-native species, has been added to the USWildflowers database (06/08/2011.)  Scientific name is Hemerocallis fulva.  It is considered weedy or invasive by some authorities.  It’s also known by the common names Tawny Daylily and Orange Daylily.  Photo below was taken in Walker County, GA on May 31, 2011.

Common Daylily, Tawny Daylily, Orange Daylily - Hemerocallis fulva