You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Vicinity of Paso de la Troje, road from Ojuelos to Aguascalientes. Near km. 39, 2 miles west of the pass Remove constraint Place: Vicinity of Paso de la Troje, road from Ojuelos to Aguascalientes. Near km. 39, 2 miles west of the pass