Description:
Descriptor of the subpopulation source of Zostera marina plants: CB (Curlew Beach, Nahant, 42? 25.2378' N, 70? 54.9474' W); LP (Lynch Park, Beverly, 42? 32.6925' N, 70? 51.5057' W); NB (Niles Beach, Gloucester, , 42? 35.8268' N, 70? 39.3553' W); WB (West Beach, Beverly, 42? 33.9155' N, 70? 47.1102)