You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place boulders used to construct an old mill dam on the Christina River near I-95 and 0.25 mile north crossing by Old Baltimore Pike Remove constraint Place: boulders used to construct an old mill dam on the Christina River near I-95 and 0.25 mile north crossing by Old Baltimore Pike Topic Grimmiaceae Remove constraint Topic: Grimmiaceae