Aquatic Vascular Plants of New England: 

 Part 3. Alismataceae 



by 

 C. B. Hellquisti and G. E. Crow^ 



INTRODUCTION 



This is the third in a series of reports on the aquatic and wetland 

 flora of New England. These reports are intended to aid conservation- 

 ists, fish and game personnel, consultants, botanists, and students in 

 the identification of aquatic plants. The coverage is strictly New Eng- 

 land but is of value throughout the northeast. Data have been gathered 

 from herbaria in New England and from personal field work. 



Chemical data presented represent samples from many waters 

 throughout New England. The alkalinity readings are total alkalinity, 

 expressed as milligrams per liter (mg/1) CaCO.^. Since pH and alkalin- 

 ity 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 (RI — Church and 

 Champlin, 1978; MA — Coddington and Field, 1978; VT — Country- 

 man, 1978; ME — Eastman, 1978; CT — Mehrhoff, 1978; NH — Storks 

 and Crow, 1978). Taxa indicated as rare, threatened or endangered for 

 the entire New England Region are also noted (Crow et al, 1981). 



We invite comments and/or criticisms on this treatment. Informa- 

 tion 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, Univer- 

 sity of New Hampshire, Durham, NH 03824. 



