
"The daylily is a member of the lily family Liliaceae, as are such plants as onions and hyacinths. Whereas lilies are in the plant genus Lilium, daylilies are in the genus Hemerocallis. Notice that we prefer to spell the word "daylily" as one word. Many dictionaries spell it as two words. The word Hemerocallis is derived from two Greek words meaning "beauty" and "day," referring to the fact that each flower lasts only one day. To make up for this, there are many flower buds on each daylily flower stalk, and many stalks in each clump of plants, so, the flowering period of a clump is usually several weeks long. And, many varieties have more than one flowering period. "
The information above, and much more, can be found at the Hemerocallis Society website, which is an excellent source of information.
Daylilies come in many colors and combinations: creamy pink, yellow, pink, pink bitone, purple, red, yellow/red, as well as many others.