The flower above is commonly known as a water lily, but to the botanists among you it's more likely known as a member of the Nymphaeaceae family, possibly either the Nymphaea Alba (White Water Lily) or the Nymphaea Capensis (Cape Blue Water Lily). What makes it difficult for me to decide is that the only references I've found so far to water lilies in the Western Cape talk about the Capensis, and yet this flower looks yellowish - a lot like the Alba. But the Alba is apparently found in the northern hemisphere, in places like England and North America.
That aside, I discovered an online store that sells what appears to be dried Nymphaea Alba. One can apparently use the dried flower to make a tea that, according to them, has the following effect: "White Lotus is both narcotic and euphoric. Like Blue Lotus, the plant is said to increase sexual arousal and enjoyment."
Now, while the name Nymphaea appears to support this, I'm keen for someone to (at their own risk ;) ) get some and give it a go. If you have tried the tea, then please do leave a comment below and let us know if you experienced any effects!