mannagrass

Manna grass refers to a group of annual grasses belonging to the genus Glyceria. These grasses are often found in wet environments such as marshes, ditches, and along the edges of water bodies. Manna grasses are characterized by their elongated, often drooping flower heads, which can contain numerous small seeds. The name "manna" is thought to derive from the biblical reference to a sweet, edible substance that sustained the Israelites in the desert, hinting at the edible nature of these grass seeds.

Historically, certain species of mannagrass have been used by indigenous peoples as a food source. The seeds are small and typically harvested by beating the seed heads into containers. They can then be ground into flour or eaten whole. While not a major staple crop in most modern societies, mannagrass holds ecological importance in wetland ecosystems, providing habitat and food for various wildlife, including waterfowl and small mammals. The plants themselves can also contribute to soil stabilization in wet areas. Identification of specific mannagrass species often relies on details of their inflorescence and seed morphology.