You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Canada Remove constraint Place: Canada Place Dunwich Township, along rail tracks ca 5 km SW of Dutton (Dutton Swamp). Remove constraint Place: Dunwich Township, along rail tracks ca 5 km SW of Dutton (Dutton Swamp). Place North America Remove constraint Place: North America Topic Poales Remove constraint Topic: Poales Topic Rhynchospora Remove constraint Topic: Rhynchospora