Trichophorum clintonii, the Clinton's bulrush, is a plant species native to Canada and the northeastern United States. It has been reported from Alberta, Saskatchewan, Ontario, Québec, New Brunswick, Maine, New York State, Michigan, Wisconsin and Minnesota. Trichophorum clintonii is a perennial herb up to 40 cm tall, forming dense clumps but without rhizomes. Culms are triagonal in cross-section. Leaves are up to 25 cm long. The inflorescences is one brown spikelet with 3-6 flowers. Achenes are flattened triangles about 2 mm long.