What is the biggest flower in the world?

The biggest flower in the world is the Rafflesia arnoldii. It grows up to 3 feet in diameter and weighs up to 15 pounds. It is also called the corpse flower.

The Rafflesia arnoldii is a rare plant found in the rain forests of Indonesia. This plant has no visible roots, stems or leaves. It is called a parasitic plant because it attaches itself to a host plant to obtain the nutrients and water it needs to survive. When the Rafflesia arnoldii is in bloom, it puts off an extremely repulsive odor that is similar to rotting meat. This rancid smell attracts the insects necessary to pollinate the plant, which in turn further propagates the species.