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It's leaves can grow up to 3 metres in diameter on a stalk of 7-8 metres in length. You can even stand on them..
In modern times lily pads have inspired green ideas to help with climate change:
floating lily pad cities for refugees displaced by rising sea levels; http://tinyurl.com/6mykcn
and solar lily pads; http://tinyurl.com/5ncwma
They truly are wonderful plants.