The Genus Glyceria is a group of perennial grasses that are native to wetlands and other moist habitats. They are commonly known as mannagrasses, and they are valued for their ability to thrive in marshy areas that may be unsuitable for other plant species. Some synonyms for the Genus Glyceria include sweetgrass, floating meadowgrass, and jointleaf manna grass. These names refer to various species within the Genus Glyceria, which can be distinguished by their height, leaf shape, and other characteristics. Mannagrasses play an important role in wetland ecosystems, providing habitat for wildlife and helping to stabilize soil and prevent erosion.