You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Frog Island No. 16 Remove constraint Place: Frog Island No. 16 Topic Polytrichaceae Remove constraint Topic: Polytrichaceae Topic Polytrichales Remove constraint Topic: Polytrichales Topic Polytrichopsida Remove constraint Topic: Polytrichopsida Topic Polytrichum Remove constraint Topic: Polytrichum