This is the flower of "Monstera Deliciosa". The plant flowers then the fruit (the thingummy inside the flower) matures for ONE YEAR. It is poisonous until it fully matures and eating it too early will result in immediate & painful blistering and loss of your voice (scary!). However after a year, when it matures and the little kernel things fall off then it's ripe and you can eat it. Apparently it has a custardy texture with a flavor somewhat like pineapple.
However, don't rely on me. Read about it on Wikipedia: en.wikipedia.org/wiki/Monstera_deliciosa
I grew up around this plant in Houston, TX where it is used as a house or landscaping plant. However, it is apparently native to the jungles of Latin America where it grows significantly larger than I ever experienced. Even so, when I was home last Christmas my parents' plant had fruit on it (yes, it's that warm at Christmas).
All that said, this was taken at the Phipps Conservatory in Pittsburgh where I saw the flower for the first time. Prior to that I'd only ever seen the plant and the fruit.
Made Interestingness #476 for September 4th, 2007