Vaal River

    By Julie Coetzee, South African Institute for Aquatic Biodiversity   Water lettuce (Pistia stratiotes L.), also known as Nile cabbage, is a free-floating aquatic plant from the family Araceae, the same family as the arum lily. It’s found on every continent except Antarctica and grows well in tropical to sub-tropical climates. Research suggests it may have originated in South America because it has natural enemies there which have […]