noun
queen of the night; night-blooming cereus; Dutchman's pipe cactus
A cactus species (Epiphyllum oxypetalum) known for its large, fragrant white flowers that bloom for only one night. The Japanese name literally means 'beauty under the moon'.
月下美人の花が今夜咲くそうです。
I heard the queen of the night will bloom tonight.
月下美人
The night-blooming cereus flowers for only one night.