You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Dunwich Township, Hwy 401 at Currie Road (to Dutton), 1.9 km NW of Dutton Post Office. Remove constraint Place: Dunwich Township, Hwy 401 at Currie Road (to Dutton), 1.9 km NW of Dutton Post Office.