You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Brock Twp., Derryville Bog, southwest side of bog, 2.5 km south-southeast of Derryville Remove constraint Place: Brock Twp., Derryville Bog, southwest side of bog, 2.5 km south-southeast of Derryville Topic Sphagnaceae Remove constraint Topic: Sphagnaceae