]> GH barcode-00967195 United States of America Massachusetts Great Potamogeton off Dodd's & boat [“Sudbury River (not far from Stone Bridge) behind J. M. Dodd’s residence” fide R. L. Angelo, Vascular Flora of Concord, Massachusetts (http://www.ray-a.com/ConcordMassFlora.pdf) Accessed 3 July 2017] Potamogeton amplifolius Tuckerman Tuckerman 2018-09-24 10:57:56 H. D. Thoreau