I posted last year about the flower on our night-blooming cereus plant, which was open for less than 24 hours. It bloomed again this year, on almost the same date.
Here is a picture from late June, when we had just noticed that a flower was growing:
Here is the flower one day before blooming (July 7):
It began to open in the early evening of July 8:
And here it is fully open in the late evening:
The following morning it was still open:
Later in the day it had closed up and started to fall off. Until next year…