This cactus flowers very rarely and only lasts for a day, I was lucky enough to catch it in time.

Technical
Date taken – 01 Aug 0216 06:52:49
Exposure time – 1/60 sec
Aperture Value – 4.38 EV (f/4.6)
ISO Speed Rating – 400
Flash Fired – Yes
Metering Mode – Pattern
Exposure Programme – Not defined
Focal Length – 35.0 mm