Water plant ID

Water plant ID

I need help Identifying a water plant.

Water plant ID

This might be a tough one to ID, because this is the only photo I actually took. I am trying to figure out what the name of this water plant is and it’s really hard to run on just a picture, so I turn to you guys. I had this in South Africa in a pond, it has elongate glossy leaves and the flowers have a strange, long shape with frilly edges and black dots inside. They might be reproductive parts, I could never get close enough. The plant spreads like wildfire (you find new ones popping up all over the pond). Any help with a common or botanical name would be appreciated!

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