]> NEBC barcode-01154881 United States of America Massachusetts Boston Basin Ecoregion: Mystic River Watershed. Middlesex Fells Reservation, northwest shore of islet off the southern tip of causeway bulge, top of South Reservoir, GPS 42 26.777'N, 71 6.933'W Potamogeton spirillus Tuckerman Tuckerman 2016-10-12 16:08:27 B. T. Hamlin