火龙果（Selenicereus undatus，又称量天尺或夜女王）的壮观、短暂、夜间绽放的花朵。

alled the "Queen of the Night" or "Honolulu Queen," these large, fragrant flowers are famous for their unique blooming cycle. These flowers are among the largest and most dramatic of all cactus flowers. They open exclusively at night and close shortly after daybreak. The bloom itself is a masterpiece of nature, showcasing a starburst of long, golden-yellow outer tepals that frame a dense, creamy-white center. At its core, the flower features a complex arrangement of vibrant yellow stamens surrounding a prominent, multi-lobed stigma. These nocturnal wonders are primarily pollinated by bats, moths, and bees, and if successfully pollinated, they develop into the well-known dragon fruit.