Night Blooming Epiphyllum

Night Blooming Orchid Cactus [Epiphyllum]

Another one of our Orchid Cacti started it's show this evening. From what I read this is more what they are like in the wild. This beautiful blossom opened up as the sun was going down. The flower has a great fragrance and it is about twice the size of the flowers on our big day-blooming Epiphyllum. It is at least 6" from tip to tip of the outside petals, with the cup of petals in the middle being over 4".

Most of the wild Epiphyllum blossoms last only one night and fade by morning so I wanted to get a shot of this right away. This is the first time this guy is blooming since we got him, so I don't know exactly what to expect. But, If I can get him in full sunlight I will try to get a nice shot with some reference to the size.

So, blooms at night, Has a blossom the size of a salad plate that is white and fragrant that you could see even if you were flying around half blind. Can you tell what they are trying to attract?