You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Floodplain of Upper Black River, Waverly Tp., ca. 5 mi. NW of Tower Remove constraint Place: Floodplain of Upper Black River, Waverly Tp., ca. 5 mi. NW of Tower Topic Plantae Remove constraint Topic: Plantae Topic Poa Remove constraint Topic: Poa Topic Poales Remove constraint Topic: Poales