Hygrophila difformis is a popular aquarium plant that has been in the trade for many years and is often sold under the name water wisteria. Hygrophila difformis is an easy to grow aquarium plant that has a very intricate leaf structure and a bright green color. This makes it an attractive aquarium plant for background areas, or it can be used close to the front if trimmed and replanted frequently. Emersed leaves of Hygrophila difformis take on a completely different appearance being smaller and round without any pinnate structures.