When I had dengue fever, my friend Chooi, gave me this pegaga plant to be eaten raw. This pegaga is different from the aquatic pegaga that we plant in our garden for ornamental purpose. In Cantonese, it is callee 'pou tei kam'. It is believed that this pegaga helped to cool down the body when a dengue fever patient consumes it. Amazingly, it helps because my platelet level began to increase after taking it.
The aquatic pegaga has bigger leaf. If I am not mistaken, it can be eaten raw as salad (or 'ulam' in Malay language).