You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Michigan Remove constraint Place: Michigan Place Rockview, SE of gravel pits Remove constraint Place: Rockview, SE of gravel pits Topic Ophioglossaceae Remove constraint Topic: Ophioglossaceae Topic Ophioglossales Remove constraint Topic: Ophioglossales Topic Polypodiopsida Remove constraint Topic: Polypodiopsida