You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Brock Township, Derryville Bog, SW side of bog, 2.5 km SSE of Derryville Remove constraint Place: Brock Township, Derryville Bog, SW side of bog, 2.5 km SSE of Derryville Topic Sphagnaceae Remove constraint Topic: Sphagnaceae