Epiphyllum (Tan Hua)

"The broad-leaved epiphyllum (Epiphyllum oxypetalum) is a particularly well-known species of epiphyllum. It bears large, strongly fragrant flowers, that bloom for a single night only.
In Chinese, there is a saying "????" (tanhua yi xian) which means "to bloom briefly", alluding to the short lifespan of the flower, which only lasts one night." (Wikipedia)