You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place From corner of 521 & SC 50 go 1.5 miles south towards the town of Trio, upper drainage of Spring Valley Swamp. Remove constraint Place: From corner of 521 & SC 50 go 1.5 miles south towards the town of Trio, upper drainage of Spring Valley Swamp. Place South Carolina Remove constraint Place: South Carolina Topic Cyperaceae Remove constraint Topic: Cyperaceae Topic Magnoliopsida Remove constraint Topic: Magnoliopsida Topic Poales Remove constraint Topic: Poales Topic Rhynchospora Remove constraint Topic: Rhynchospora