Salt marsh that is hayed by Dan McHugh in Rowley and reference areas in the vicinity of Stackyard and Patmos Roads.   Four studies sites (two hayed and two references).  The two hayed sites are McH1  (hayed every year, north of Patmos Rd) and EPH (east of Perry's land and between Sawyer Creek and Patmos Rd, hayed every two years, last hayed in 1999).  The two reference sites are PUH (Perry Unhayed, between Sawyer Creek and Patmos Rd) and Club Creek (south of Stackyard Rd and bounded on its E side by the PRNWR).