Medicinal plants near water

In the vicinity of water or in the water, there are a number of plants that are not well-researched in terms of content substances, probably because of their difficult collection. The exception is the yellow water-lily (Nuphar luteum) of the family of Nymphaeaceae containing terpenic alkaloid nufarin, whose rhizomes have been collected since the 17th century by herbalists for its anticancer activity.