Not sure about and English name for this one. From what my parents have told me, and what I've seen, it blooms for one night a year. This plant was neglected out in the back yard and caught us by surprise this morning, so I took the opportunity to snap some pictures. As I type this about 8 hours later, the flower is wilted and about to fall off.
[Shot with 5D / 85mm 1.8 @1.8]