You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Frederick Twp. On N. side of M-72 at Howes Lake Rd. ca. 4 mi. N.W. of Grayling. Remove constraint Place: Frederick Twp. On N. side of M-72 at Howes Lake Rd. ca. 4 mi. N.W. of Grayling.