The Amorphophallus Titanum has the largest unbranched inflorescence (or spadix) in the world; it can reach over three meters (or nearly 10 feet) long! The inflorescence happens to be the large stem in the middle of the flower... The Amorphophallus Titanum starts out as a large tuberous root called corm, which can weigh up to 200lbs. The corm grows and stores energy for up to ten years before it flowers.