You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Language UND Remove constraint Language: UND Place Sleeping Bear Dunes National Lakeshore; Good Harbor Bay,along Remove constraint Place: Sleeping Bear Dunes National Lakeshore; Good Harbor Bay,along Topic Equisetales Remove constraint Topic: Equisetales Topic Equisetum Remove constraint Topic: Equisetum Topic Polypodiopsida Remove constraint Topic: Polypodiopsida Type still image Remove constraint Type: still image