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 .
Many dictionaries spell it as two words.
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. Able to survive with very little care in a wide range of climates. Suitable for all types of landscapes. Drought resistant and almost disease and insect free.