The world’s largest flower is Rafflesia arnoldii. This rare flower is found in the rainforests of Indonesia. It can grow to be 3 feet across and weigh up to 15 pounds! Repost • @sciencechannel The rafflesia has no stems, no leaves, and no roots. The largest flower on Earth is a holoparasite of vines that smells like rotting flesh and can weigh up to 22 lb. Holoparasites cannot complete their life-cycle without exploiting a suitable host. Once it does, it will begin spreading its absorptive organ