Figure 49. — Detail of salt marsh shown in Figure IT; 

 from right to left, zones of Spartina patens, Carex mari- 

 tlma. Juncus balticus var. littoralis and Calamagrostis 

 canadensis. 



. 



Figuke 50. — Muddy shores of Herricks Bay, Brooklin; 

 Zostera marina on tidal flats in background; rockweeds on 

 rocks on lower beach; incipient salt marsh with Spartina 

 alternifolia on upper part of lower beach. 



