]> NEBC barcode-00282689 United States of America Massachusetts Mystic River Watershed, Middlesex Fells Reservation, south end of small man-made pond on south side of South Reservoir dam, along trail near gate 12 Persicaria extremiorientalis (Voroschilov) Tzvelev (Voroschilov) Tzvelev 2013-05-31 12:56:47 B. T. Hamlin