Flying Saucer Cactus

 A few days ago the Flying Saucer Cactus started growing a large bud.  

Flying Saucer Cactus

Then three days later, just after sunset it started to bloom.  It continued opening through the night.  These next two pictures were taken at 7:30 pm.

Flying Saucer Cactus

Flying Saucer Cactus

The next three pictures were taken at 10:30 pm.

Flying Saucer Cactus

Flying Saucer Cactus

Flying Saucer Cactus

By sunrise the bloom was 9 1/2 inches in diameter.

Flying Saucer Cactus

Flying Saucer Cactus