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'^^ ^l<^ ACKNOWLEDGEMENTS 



We wish to thank Drs. Robert K. Godfrey, Robert R. Haynes, and 

 Arthur C. Mathieson for their helpful comments on the manuscript. 

 Bruce Sorrie kindly supplied locality data not documented in herbaria 

 for some of the rarer taxa occurring in southeastern Massachusetts. 

 We are also grateful to the curators of the following herbaria for use of 

 their collections: BOSC, BRU, CONN, CUW, GH, HNH, KIRI, MASS, 

 MAINE, NCBS, NHA, NEBC, VT, and YU. A special thanks is 

 extended to Pamela Bruns, who prepared the illustrations. 



Profirams 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. 



