You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Au Sable Twp. 1/4 mi. N. of the Au Sable Riv. bridge on S. side of town of Oscoda. Remove constraint Place: Au Sable Twp. 1/4 mi. N. of the Au Sable Riv. bridge on S. side of town of Oscoda.