You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Boston Mountain Ranger District Ozark National Forest, 4.3 miles south of the Mulberry River on Arkansas Highway 23 at the Pig Trail Scenic Byway Sign. Remove constraint Place: Boston Mountain Ranger District Ozark National Forest, 4.3 miles south of the Mulberry River on Arkansas Highway 23 at the Pig Trail Scenic Byway Sign.