]> NEBC barcode-00549186 United States of America Massachusetts Boston Basin Ecoregion: Mystic River Watershed. Middlesex Fells Reservation, Greenwood Park parking lot near entrance on west side, GPS 42 27.734’N, 71 5.478’W Amaranthus blitoides S. Watson S. Watson 2015-04-10 08:51:37 B. T. Hamlin