You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Along road with parallels Expressway on E. side, Hebron Swamp, Hebron Twp., ca. 11 mi. SE of Mackinaw City. Remove constraint Place: Along road with parallels Expressway on E. side, Hebron Swamp, Hebron Twp., ca. 11 mi. SE of Mackinaw City. Place Cheboygan Remove constraint Place: Cheboygan Place USA Remove constraint Place: USA Topic Alismatales Remove constraint Topic: Alismatales Topic Plantae Remove constraint Topic: Plantae