Glyceria fluitans × notata, commonly known as Floating Sweet-grass, is a hybrid grass that typically grows to a height of 1-2 feet (0.3-0.6 meters). It is a cross between Glyceria fluitans and Glyceria notata, both of which are adapted to wet environments such as the edges of ponds, streams, and marshes. Floating Sweet-grass has a creeping habit and can form dense mats on the water’s surface. The flowers are green and inconspicuous, appearing in the summer, and are not the main attraction of this plant.

Floating Sweet-grass is valued for its ability to stabilize soil and provide habitat for wildlife in wetland areas. It is often used in water gardens, along pond edges, and in constructed wetlands for water purification. This grass thrives in full sun to part shade and prefers very slow draining loam or clay soils that are consistently moist or even waterlogged. It is important to maintain high or very high water levels for optimal growth. While generally low-maintenance, it can become invasive in some conditions, spreading rapidly and potentially outcompeting native species.CC BY-SA 4.0