Daylilies (Hemerocallis) are often confused with Lilies by beginning gardeners because the flowers look similar. Lilies are bulbs while daylilies are enlarged roots which can be divided for propagation. The individual flower on a daylily will last 1-2 days but many more flowers bloom in subsequent days to give constant bloom for 1-2 months in early summer.
Here are some photos of daylilies at Dawn Gardens:
Example of one of the new crested varieties.
The key to making daylilies look their best is periodic deadheading of the old flowers and clean up and pruning of the dead leaves. It is important to remove the old flower stalks and seed heads to encourage continued flowering. The above photo shows flowers and flower buds. The next photo shows seed capsules on the flowering stalks which should be removed.