Hemerocallis citrina

Hemerocallis citrina, common names citron daylily and long yellow daylily, is a species of herbaceous perennial plant in the family Asphodelaceae. Hemerocallis citrina can reach a height of 90–120 centimetres (35–47 in). It has bright green, linear arching leaves about 40 cm long. Flowers are lemon yellow, trumpet-shaped, showy and very fragrant, about 15 centimetres (5.9 in) in diameter. They bloom from June to July. Long yellow day lily is cultivated in Asia for its edible flowers.