AQUATIC VASCULAR PLANTS OF NEW ENGLAND: 

 Part 1. Zosteraceae, Potamogetonaceae , 

 Zannichelliaceae , Najadaceae 



by 



C. B. Hellquist and G. E. Crow 



INTRODUCTION 



This is the first in a series of reports on the aquatic and 

 wetland flora of New England. Eventually all of the reports 

 will be combined into a manual of aquatic and wetland plants of 

 New England. By releasing these preliminary reports on families 

 or groups of families we hope for constant updating through 

 field work until the final manual is prepared. 



A treatment of the aquatic and wetland plants of the New 

 England region has long been needed. The manual is being 

 prepared to aid conservationists, fish and game personnel, 

 consultants, botanists and students in the identification of 

 aquatic plants. The coverage is strictly New England but is of 

 value throughout the northeast. Data have been gathered from 

 herbaria in New England and from personal field work. 



Chemical data presented have been gathered from many waters 

 throughout New England. The alkalinity readings are total 

 alkalinity, expressed as milligrams per liter (mg/1) CaC03. 

 Since pH and alkalinity vary greatly during the day, the values 

 are only indicative of the water quality. Chloride values are 

 given where data are available and of value. 



The rare and endangered plant lists referred to are those 

 prepared for each of the six New England States by the New 

 England Botanical Club in cooperation with the United States 

 Fish and Wildlife Service, Office of Endangered Species, Newton 

 Corner, MA (Church and Champlin, 1978; Coddington and Field, 

 1978; Countryman, 1978; Eastman, 1978; Mehrhoff, 1978; 

 Storks and Crow, 1978) . 



We invite comments and/or criticisms on this report. 

 Information on any species omitted or any known localities not 

 documented by us will be welcomed. If anyone is interested in 

 specific localities of any of the species indicated on the dot 

 maps, please contact us. 



Dr. C. B. Hellquist, Department of Biology, Boston State 

 College, 625 Huntington Avenue, Boston, MA 02115. 



Dr. G. E. Crow, Department of Botany and Plant Pathology, 

 Nesmith Hall, University of New Hampshire, Durham, NH 03824. 



