Common names can be confusing because one plant can have many common names and a common name can be used for a few different plants.
I live near Kansas City, Mo. and usually around here a ditch lily is the old fashioned orange daylily which has leaves about 1 inch wide and 12-18 inches long all growing at the base of the plant. It sends up stems around 3 feet high with the flowers at the end of the stem
Tiger lilies on the other hand, send up a stem 3-4 feet tall with short leaves all along the stem. A group of orange flowers with black spots bloom at the top of the stem. Tiger lilies also produce little black bulbuals where the leaf meets the stem. These fall off and produce more plants.
Again since these are common names that is what hey are called around here.
Also tiger lilies belong to the Lillium plant family. davesgarden.com/guides/pf/go/1025/
Where as day lilies belong to the Hemerocallis family so are not true lilies davesgarden.com/guides/pf/finder/index.php
Edited by: SHARJOPAUL at: 7/6/2009 (20:07)