Isoetaceae, commonly known as the quillwort family, is a group of aquatic or semi-aquatic plants found primarily in freshwater habitats. These plants are characterized by their elongated, grass-like leaves that grow in a rosette pattern. Isoetaceae species are unique in their ability to survive in low-light conditions and can often be found in shallow waters or muddy substrates. The family includes several genera, with Isoetes being the most well-known. Isoetaceae plants reproduce via spores rather than seeds, and they have a distinctive life cycle that includes both a gametophyte and sporophyte stage. These plants play an important role in their ecosystems, providing habitat and food for various aquatic organisms.