ABSTRACT 



This paper is the first in a series of reports on the 

 aquatic and wetland flora of New England. It treats all species 

 of the Zosteraceae, Potamogetonaceae , Zannichelliaceae and 

 Najadaceae occurring in New England and includes keys, comments 

 on taxonomy and nomenclature, habitat and distributional 

 information, water chemistry data, illustrations and dot maps. 

 Several species are regarded as rare and endangered in one or 

 more of the six New England states and are so noted. 



One taxon, Potamogeton f iliformis var. occidentalis 

 (previously reported as P_^ vaginatus ) is newly reported for New 

 England. 



KEY WORDS: Aquatic Plants, New England Flora, Taxonomy, 

 Potamogetonaceae, Zosteraceae, Zannichelliaceae, Najadaceae, 

 Potamogeton , Ruppia , Zostera , Zannichellia , Najas , Pondweed, 

 Eelgrass, Widgeon-grass, Horned Pondweed, Naiad. 



