You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place L. bank of Spruce River, just below first rapids, 7 km SSE of Black Sturgeon Research Station. Remove constraint Place: L. bank of Spruce River, just below first rapids, 7 km SSE of Black Sturgeon Research Station. Place Thunder Bay Remove constraint Place: Thunder Bay Topic Hypnum Remove constraint Topic: Hypnum Topic Plantae Remove constraint Topic: Plantae Type still image Remove constraint Type: still image