Acknowledgements 



Over the past three years many people have generously 

 contributed their time and thoughts to this study. I wish 

 to express my sincere thanks to Dr. Garrett E. Crow for his 

 invaluable assistance and constant support throughout this 

 study. I wish to thank George Gavutis, manager of the 

 Parker River National Wildlife Refuge, and his staff for 

 allowing me complete access to all areas of the Refuge. 

 Without their full cooperation this study could not have 

 been completed. Tom Stubbs provided me with valuable 

 information concerning the history of the refuge. Lou 

 Kilborn provided me with a wealth of information on the 

 history of the southern portion of the island. I wish to 

 thank the curators of the herbaria from which specimens were 

 examined. I am grateful to Dr. Barre Hellquist for 

 checking the identification of the pondweeds and for his 

 critical review of the manuscript. Discussions and critical 

 reviews of the manuscript by the following persons have 

 greatly aided the preparation of this paper: Dr. A. Linn 

 Bogle, Mr. Larry Morse, Ms. Margo Reynolds, and Ms. Irene 

 Storks. Finally, I would like to thank my wife, Lisa 

 Bandazian, for the illustrations used in the text and for 

 her patience and support throughout this study. This study 

 was supported in part by two U.N.H. Central University 

 Research Grants (CURF S86 and S106) . 



This manuscript was prepared using the DECsystem-10 

 Model 1090 computer at the University of New Hampshire. 



Cover: Beach Plum ( Prunus maritima ) by Lisa Bandazian. 



Programs of the New Hampshire Agricultural Experiment 

 Station are open to all persons without regard to race, 

 color, national origin or sex. The University of New 

 Hampshire is an Affirmative Action/Equal Opportunity 

 Employer. 



