Glyceria is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous grasses found in wet areas in temperate regions worldwide. The base of the grass grows along the ground and may root at several places.

Western mannagrass is a short-lived, cool season perennial grass with flaccid stems (culms) that reach a height of 70 to 150 cm. The form is moderately coarse textured, clumpy, and upright to nearly flat: spreading from rhizomes or decumbent (low lying) stems that root at the nodes (joints).

American Manna Grass is a robust, handsome species common to open shallow waters or mud throughout Minnesota. It can generally be distinguished by its shiny, succulent foliage and stem, and light yellow-green color.

Fowl Manna Grass is common in Minnesota and widespread throughout the temperate regions of North America. It favors a wide range of wet habitats from open marshes, wetlands and lakeshores to semi-shaded woodland ponds.

1 day ago · American Mannagrass — Glyceria grandis. Montana Field Guide. Montana Natural Heritage Program. Retrieved on April 4, 2025, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=PMPOA2Y080. Montana Field Guide contains a wealth of information about Montana's diverse species.

American manna grass has been known to cause cyanide poisoning in cattle. However, the grains are edible, as in other manna grasses (Glyceria).

Glyceria grandis is a species of grass known by the common name American mannagrass. It is native to Canada and the United States, where it is widespread in distribution. It is most commonly found in wet areas such as riverbanks and ponds.

Reed mannagrass emerges early in the year and concentrates up to 50% of its biomass in its root system (Westlake 1966). The energy stored in the roots and rhizomes enable this species to produce new shoots through the growing season (Buttery and Lambert 1965).

Glyceria grandis is a species of mannagrass known by the common name American mannagrass. It is native to Canada and the United States, where it is widespread in distribution. It is most commonly found in wet areas such as riverbanks and ponds.

Tall mannagrass is a rapidly establishing native species suitable for restoration of swamps, the edges of marshes, ponds, and streams, and other wetland plant communities where an herbaceous understory is desired. It has versatility for use along creeks and ditch bottoms where exposure may vary from full sun