You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Drummond Island T41N R7E Sec 16-17 Remove constraint Place: Drummond Island T41N R7E Sec 16-17 Place USA Remove constraint Place: USA Topic Potamogeton Remove constraint Topic: Potamogeton Topic Potamogetonaceae Remove constraint Topic: Potamogetonaceae