You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Isle Royale National Park. "Cobble Marsh" near north tip of island. Remove constraint Place: Isle Royale National Park. "Cobble Marsh" near north tip of island. Place Keweenaw Remove constraint Place: Keweenaw Place Michigan Remove constraint Place: Michigan Topic Cystopteridaceae Remove constraint Topic: Cystopteridaceae Topic Polypodiales Remove constraint Topic: Polypodiales