IINH LIBRARY 



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ABSTRACT 



This paper is the fourth in a series of reports on the aquatic and 

 wetland flora of New England. It treats all species of the Juncagina- 

 ceae, Scheuchzeriaceae, Butomaceae, and Hydrocharitaceae occur- 

 ring in New England and includes keys, comments on taxonomy and 

 nomenclature, habitat and distributional information, water chemis- 

 try data, illustrations and dot maps. Those species regarded as rare 

 and endangered in the New England Region or in one or more of the six 

 New England states are also noted. 



One species included here, Triglochin gaspense Leith and Love, 

 has been only recently described and is therefore absent from most 

 standard manuals. 



KEY WORDS: Aquatic plants. New England Flora, Taxonomy, Juncaginaceae, 

 Scheuchzeriaceae, Butomaceae, Hydrocharitaceae, Triglochin, Scheuchzeria, Butomus, 

 Vallisneria, Egeria, Elodea, Arrow-grass, Flowering Rush, Tapegrass, Eelgrass, 

 Waterweed. 



