]> GH barcode-01695201 United States of America Michigan Keweenaw Co., Lake Superior, bordering "Beaver Pond" near the "Central Mine," in the southwestern inlet of the pond, for a few rods above the crossing. Potamogeton obtusifolius Mertens & W. D. J. Koch Mertens & W. D. J. Koch 2021-02-15 07:14:01 J. W. Robbins