You searched for: Place North America Remove constraint Place: North America Place Superior Twp. University of Michigan Botanical Gardens, Dixboro Site. 4.5 miles northeast of Ann Arbor; east-bank of Fleming Creek just south of auto bridge Remove constraint Place: Superior Twp. University of Michigan Botanical Gardens, Dixboro Site. 4.5 miles northeast of Ann Arbor; east-bank of Fleming Creek just south of auto bridge Place Washtenaw Remove constraint Place: Washtenaw Topic Ambrosia Remove constraint Topic: Ambrosia Topic Asteraceae Remove constraint Topic: Asteraceae Topic Plantae Remove constraint Topic: Plantae