day lily/Hemerocallis fulva

"Hemerocallis fulva", the orange day-lily, is a species of daylily native to Asia. It is very widely grown as an ornamental plant in temperate climates for its showy flowers and ease of cultivation. It is not a true lily in the genus "Lilium", but gets its name from the similarity of the flowers and from the fact that each flower lasts only one day.