Glyceria notata, the plicate sweet-grass[1] or marked glyceria, is an invasive specie part of the Poaceae family. tufted, perennial grasses in the mannagrass genus, found in all continents of the world. Its culms are 30–80 cm in height, ascending from a prostrate base, with dark- to bluish-green, flat or folded leaf-blades some 5–30 cm long by 3–14 mm wide.