Amorphophallus, also known as Voodoo Lily, is from the Arum family. Strange and exotic, it is often grown more as a curiosity, although the starchy tuber is used for food in some parts of the world.  In the Fall, the bulb goes dormant, so bring it inside and store it in a dry, cool place, like a garage where it will not freeze.  In the Spring when you see the spike popping out, begin to water.