You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place along Clinch River & St Rt 627, about 3 km SW of Flat Rock & 12.5 km SW of Speers Ferry. Remove constraint Place: along Clinch River & St Rt 627, about 3 km SW of Flat Rock & 12.5 km SW of Speers Ferry.