Daylilies are perennial plants. The name Hemerocallis comes from the Greek words ἡμέρα (hēmera) "day" and καλός (kalos) "beautiful". This name alludes to the attractive flowers of this genus which typically last no more than 24 hours. The flowers of most species open at sunrise and wither at sunset, possibly replaced by another one on the same scape (flower stalk) the next day. Some species are night-blooming. ---wikipedia
Native to Eurasia but these are popular and widely seen throughout the world.
Lovely yellow flowers spotted in the flowerbeds beside the pool here at the apartments.