]> NEBC barcode-01009247 United States of America Massachusetts Concord river above French's ["the farm of Daniel French's father"] on shell heaps ["referring perhaps to the river beneath Clam Shell Bluff which was the site of noteworthy shell heaps left by the Indians" R. J. Eaton 1968] Potamogeton epihydrus Rafinesque Rafinesque 2020-05-04 06:42:07 T. Morong