This is a Peace Lily. It looks a little sickly in this picture but it's much healthier in reality.
Peace Lilies are supposed to be good at managing indoor pollution. The house I lived in previously had a really damp, moldy basement. This plant almost died while I was living there. When I bought my new house, the plant started to perk up a bit and had been doing well ever since.
All this to say, this plant has NEVER bloomed. I'm not sure why. I've read online horticulture sites (yes, I really am that boring) and have found nothing useful. Well, I was looking at it today and found this:
That little white thing in the middle of the picture is a BUD! Can you believe it? It should be nice and bloomed by Easter. I'm so excited!