You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Marathon, north side of Rt. 17, west side of road Remove constraint Place: Marathon, north side of Rt. 17, west side of road Place North America Remove constraint Place: North America Place Ontario Remove constraint Place: Ontario Topic Diphasiastrum Remove constraint Topic: Diphasiastrum Topic Lycopodiopsida Remove constraint Topic: Lycopodiopsida