]> GH barcode-00421748 United States of America California Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line Potamogeton richardsonii (A. Bennett) Rydberg (A. Bennett) Rydberg 2014-01-21 13:53:31 L. E. DeBuhr & R. F. Thorne