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TAXONOMY, ARRANGEMENT, and VOUCHER SPECIMENS 



The following taxa of vascular plants were collected on 

 Plum Island during the spring of 1977 through the spring of 

 1979. The taxonomy and arrangement of families follows that 

 of Fernald (1950) unless otherwise stated. To fascilitate 

 use of the flora, genera and species are arranged 

 alphabetically within each family. The taxonomy of the 

 ferns follows Tryon (1978) . Cultivated plants that are 

 persisting have been included in the flora. 



In an attempt to make the flora as complete as possible 

 those species cited by Harris (1975) as occurring on the 

 island, although not found by the author, are included. The 

 herbaria of Boston University (BU) , the University of 

 Massachusetts (MASS) , the New England Botanical Club (NEBC) , 

 the University of New Hampshire (NHA) , and the Peabody 

 Museum of Salem (PM) were searched for Plum Island 

 specimens. These specimens are cited in the list by 

 author's name, collection number, and herbarium in which 

 they are deposited. The specimens collected by the author 

 are cited as MJM, followed by the collection number. 

 Voucher specimens have been deposited in the Hodgdon 

 Herbarium, University of New Hampshire (NHA) . 



The importance of each taxa has been designated using 

 the following quantitative estimates based on coverage in 

 the vegetation type were it occurs: rare less than 1 

 percent; occasional 1 to 5 percent; frequent 5 to 50 

 percent; common 50 to 75 percent; abundant 75 to 100 

 percent. Even though these are only estimates it is felt 

 they will provide a basis for detecting floristic changes. 



ABBREVIATIONS 



BU - Stuart K. Harris Herbarium of Boston 

 University, Boston, MA. 



GH - Gray Herbarium of Harvard University, 

 Cambridge, MA. 



HNH - Jesup Herbarium of Dartmouth College, 

 Hanover, NH. 



MASS - Herbarium of the Univ. of Massachusetts, 

 Amherst, MA. 



MJM - Mark J. McDonnell 



