You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Iowa Remove constraint Place: Iowa Place North America Remove constraint Place: North America Place Willow Slough Public Hunting Area, 3 miles south of Henderson. Remove constraint Place: Willow Slough Public Hunting Area, 3 miles south of Henderson. Topic Cyperaceae Remove constraint Topic: Cyperaceae Topic Plantae Remove constraint Topic: Plantae Topic Poales Remove constraint Topic: Poales