Rorippa aquatica (Syn: Armoracia aquatica)

"This plant is also known as amoratia Aquatica. When it is young it looks like a normal green plant with a rosette shape. When it is a bit older and taller it will get lovely serrated leaves and that makes it special. It most resembles a hygr Difformis but grows slower and therefore easier to care for. It is a very strong plant with little demands. If you really like this plant you can let the broken off leaves float on the water surface. Spontaneously new complete plants will arise that can be used as forefront plants for a while. "