You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Dunwich Township, Knowles Wildlife Preserve, Dunwich Swamp, 4.5 km SW of Dutton Post Office Remove constraint Place: Dunwich Township, Knowles Wildlife Preserve, Dunwich Swamp, 4.5 km SW of Dutton Post Office Place Elgin Remove constraint Place: Elgin Topic Schoenoplectus Remove constraint Topic: Schoenoplectus