There are a few synonyms that can be used to refer to the genus Planera. One of these is Planerodiscus, which is often used in reference to a specific species within this genus, Planera aquatica. Another synonym is Salix sect. Planera, which is used to describe a group of plants within the Salix genus that share similar characteristics to the Planera species. The genus Planera is also sometimes referred to as the water elm, as it is a small tree that grows in wetland areas and has a similar appearance to the elm tree. Regardless of which synonym is used, the plants within this genus are unique and interesting specimens that have important ecological roles.