Ribbon grass, also known as reed canary grass, is a tall and coarse perennial grass that is common in wetlands and along stream banks in many regions of the world, including North America and Europe. It can reach up to 6 feet tall and has long, flat leaves that are about 1 inch wide. The flowers of ribbon grass are arranged in dense spikes and have a distinctive purplish hue. While ribbon grass can be an attractive ornamental plant in gardens, it is considered an invasive species in many areas, spreading aggressively and displacing native plant species. It has been known to colonize wetlands and other natural areas, where it can outcompete and shade out other vegetation, disrupt habitat for animals, and negatively affect water quality.