Cinna arundinacea, commonly known as Stout Woodreed or Sweet Woodreed, is a perennial grass that is indigenous to a variety of moist habitats including wet meadows, marshes, floodplains, and along streams and rivers in Canada and the United States east of the Rocky Mountains. It can reach heights of up to 6 feet (1.8 meters) and is characterized by its upright, clumping form and fine-textured, green foliage that turns golden-brown in fall. The inflorescences are airy, open panicles that appear in late summer, and while not particularly showy, they add a delicate texture to the landscape.

Stout Woodreed is valued for its adaptability to wet conditions and is often used for erosion control along waterways and in naturalized areas. It provides essential cover and food for wetland wildlife species and is suitable for rain gardens and restoration projects. This grass prefers consistently moist, fertile soils and can tolerate a range of light conditions from full sun to partial shade. While generally low-maintenance, it can spread by rhizomes and self-seeding, potentially becoming aggressive in ideal conditions. Gardeners should be aware of its potential to spread when considering it for smaller spaces or more formal plantings.CC BY-SA 4.0