You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Wilson Twp. 200 ft. W. of Spruce Rd. .9 mi. S. of Werth Rd. ca. 5 mi. S.W. of Alpena. Remove constraint Place: Wilson Twp. 200 ft. W. of Spruce Rd. .9 mi. S. of Werth Rd. ca. 5 mi. S.W. of Alpena.