Regarding the identification. The flower is a dead-ringer for the E. pachanoi, though the cactus in question is not E. pachanoi (I have one of those growing next to it and the body is completely wrong). The body of the plant resembles the Pipe Organ cactus, but the flower has a different form and no coloration. I'm going to guess that it is a close relative of the Pipe Organ Cactus. Thanks Ross.
Additional information: the flower has no scent, it flowered at night, but has remained open during the day.
No cacti expert, but I think that the spines are usually a bit longer on the Cereus species; it looks to me more like either a Weberbauerocereus or a Trichocereus (though I believe that Trichocereus bloom at the crown and then send up new growth, rather than blooming further down the column...) Whatever it is, it's great looking.
Adam
__________________
I've never met an orchid I couldn't kill...
No cacti expert, but I think that the spines are usually a bit longer on the Cereus species; it looks to me more like either a Weberbauerocereus or a Trichocereus (though I believe that Trichocereus bloom at the crown and then send up new growth, rather than blooming further down the column...) Whatever it is, it's great looking.
Adam
The orange spines you see in many of the pictures are actually from a Solanum pyracanthum, IMHO a very neat plant!
I also have a cactus like yours! But mine has an awful scent to it!! But it sure is pretty! But the cactus plant itself is fairly low growing. The flowers only last a couple days.
I am a complete novice when it comes to cacti, but I realize that many cacti flowers look similar to the flowers we have. I'm curious what pollinates them and why they take the form they do. I've seen no bees or humming birds by my plants.