The flower with the world's largest bloom is the 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!
This question could go two ways, depending on what you consider a flower. Rafflesia arnoldii is the largest single flower in the world at three feet across and with petals .75" thick, whereas...
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