You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries 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 Ontario Remove constraint Place: Ontario Topic Cyperaceae Remove constraint Topic: Cyperaceae Topic Rhynchospora Remove constraint Topic: Rhynchospora