The largest flower in the world:
Rafflesia arnoldii is the largest flower in the world.
This flower mostly found in Indonesia and it is a parasite. It has not leaf, root, or stem. It actually attached to other plants and take water, minerals and other nutrients, etc.
The weight of this flower is about 15 pounds and its size approximately 3 to 4 feet. The smell of this flower is like rotten flesh which attracts small insects and bugs then help to pollinate the plant.
Another longest flower in the world is titan arum or amorphophallus titanium. It is the longest flower in the world. This flower length reaches up to 12 feet approximately and weight is nearly 170 pounds.
This flower also found in Indonesia. It small also like rotten flesh which attracts bus insects to pollinate this flower. This not a single flower actually it clusters consist of many tiny flowers called an inflorescence.