You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Language UND Remove constraint Language: UND Place Erie Remove constraint Place: Erie Place North America Remove constraint Place: North America Place North of Long Ridge, 0.45 mile & 240 degrees from Signal Tower Foundation. Mill Creek Twp. Remove constraint Place: North of Long Ridge, 0.45 mile & 240 degrees from Signal Tower Foundation. Mill Creek Twp. Place Pennsylvania Remove constraint Place: Pennsylvania Topic Magnoliopsida Remove constraint Topic: Magnoliopsida Topic Poales Remove constraint Topic: Poales