You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Ann Arbor Twp. University of Michigan Botanical Gardens, Dixboro Site. 4.5 miles northeast of Ann Arbor. NE of barn at Gate 4 along border of mowed meadow and oak-elm woods in wet depression. Remove constraint Place: Ann Arbor Twp. University of Michigan Botanical Gardens, Dixboro Site. 4.5 miles northeast of Ann Arbor. NE of barn at Gate 4 along border of mowed meadow and oak-elm woods in wet depression.