You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place at Three-Pipes Rec. Area at S. side of Wurtsmith Air Force Base, ca. 1.5 mi. NW of town of Oscoda. Remove constraint Place: at Three-Pipes Rec. Area at S. side of Wurtsmith Air Force Base, ca. 1.5 mi. NW of town of Oscoda.