Flowers are lemon yellow, trumpet-shaped, showy and very fragrant, about 15 centimetres (5.9 in) in diameter.

Long yellow day lily is cultivated in Asia for its edible flowers.

It grows in forest margins, grassy fields and slopes, at an elevation of 0–2,000 metres (0–6,562 ft) above sea level.

Dried or fresh flowers, sometimes called "gum jum" or "golden needles" (Chinese: 金針; pinyin: jīnzhēn) or as huánghuācài (黃花菜, lit.

'dried flower'), and feature in several soups and Burmese salads, including kya zan hinga.