]> GH barcode-01632508 United States of America South Carolina Sandy Island, 20 mi NE of the city of Georgetown. Isl. formed by the confl. of the Waccamaw & Great Pee Dee Rivers.; Go S from N boat landing, take 4th right (E) to the end then left, site ca. 1 mi. (0.5 mi west of Black Cr.) Sagittaria graminea Michaux Michaux 2020-10-08 15:53:29 A. B. Pittman [data not captured]