Family Marsileaceae, commonly known as the pepperwort family, is a group of aquatic ferns that is widely distributed around the world. This family is characterized by having four-leaf clover-like fronds, which make it a popular choice for freshwater aquariums and water gardens. Although the term "Family Marsileaceae" is the most commonly used name, there are a few other synonyms for the group. These synonyms include the Pilulariaceae family, which is a smaller group within Marsileaceae, and Salviniales Order. Regardless of the name used, the family remains a fascinating group of freshwater plants that are admired by many.