Glyceria elata, commonly known as Tall Mannagrass, Tufted Tall Mannagrass, or Fowl Mannagrass, is a perennial, deciduous grass native to temperate regions of western North America. It thrives in wetlands, including marshes, swamps, and along the edges of streams and rivers, where it forms dense stands. This grass typically grows to a height of 1.5-4 feet (0.46-1.2 meters) and is characterized by its upright, tufted growth habit. The flowers of Glyceria elata are green and may go unnoticed due to their subtlety, blooming in the summer. The plant’s foliage is a notable feature, providing a lush, green backdrop in water gardens or naturalized areas.

Tall Mannagrass is valued for its ability to stabilize soil and provide habitat for wildlife, particularly in riparian zones. It is often used in wetland restoration projects and can be planted in rain gardens or along pond edges. In cultivation, it requires consistently moist to wet conditions and can tolerate standing water, making it suitable for water features. It adapts well to full sun or part shade and prefers slow-draining clay or loam soils. While generally low-maintenance, it can spread aggressively in ideal conditions and may require management to prevent unwanted expansion.CC BY-SA 4.0