How to propagate small water lily plants?

A few years ago a friend gave me this pot of small water lily plants.

 Last year I heard Eannelee, eannelee@hotmail.com , mentioned that water lily plants could be propagated from leaves. I took a leaf with a grwing point as shown below

 It was planted in a small container with some soil and water

A few days later a new shoot appeared.

At 2 weeks old the new plant grew bigger.

 It was transplanted to a small pond. It grew up ,into a new plant, bigger than the mother plant and producing bigger flowers too.

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