- day lily, daylily - any of numerous perennials having tuberous roots and long narrow bladelike leaves and usually yellow lilylike flowers that bloom for only a day
--1 is a kind of liliaceous plant
--1 is a member of Hemerocallis, genus Hemerocallis
--1 has particulars: lemon lily, Hemerocallis lilio-asphodelus, Hemerocallis flava