You searched for: Collection University of Michigan Herbarium Catalog Collection Remove constraint Collection: University of Michigan Herbarium Catalog Collection Place Mackinac Remove constraint Place: Mackinac Place St. Helena Island just back of old gravelly storm ridge of big Thuja on SW side of Island (sec. 13). Remove constraint Place: St. Helena Island just back of old gravelly storm ridge of big Thuja on SW side of Island (sec. 13). Topic Plantae Remove constraint Topic: Plantae Topic Poales Remove constraint Topic: Poales