You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place North America Remove constraint Place: North America Place Spruce River cut-off, 18 km NW. of Dorion. Remove constraint Place: Spruce River cut-off, 18 km NW. of Dorion. Place Thunder Bay Remove constraint Place: Thunder Bay Topic Plantae Remove constraint Topic: Plantae Topic Salicaceae Remove constraint Topic: Salicaceae