36 - 



narrow-leaved variety, which rarely sets fruit, was originally 

 described from Uxbridge, Massachusetts. Range extends out of 

 New England to one locality in southeastern Quebec. 



Rare and endangered plant lists: New Hampshire, Connecticut 



alkalinity: mean 9.4 mg/1; range 2.5-17.0 

 pH : mean 6.7; range 6.3-7.1 



19. Potamogeton vaseyi Robbins Figi 21, Map 21 



Uncommon at widely scattered locations in moderately 

 alkaline waters throughout New England. Plants without floating 

 leaves are easily confused with P_^ pusill us var. gemmipar us . 

 Range extends from New Brunswick west to Wisconsin, south to 

 Connecticut, Pennsylvania, northeastern Ohio, Michigan, northern 

 Illinois, Wisconsin, and Minnesota. 



Rare and endangered 

 Connecticut 



plant lists 



Maine, New Hampshire, 



alkalinity: mean 24.5 mg/1; range 7.0-55.0 mg/1 

 pH : mean 7.2; range 6.7-7.6 



20 



Potamogeton lateral is Morong Fig. 22, Map 22 



Ext 

 local ities. 

 been docume 

 interest s 

 vaseyi . Ho 

 leaves of 

 Connecticut 

 have been 

 P . pusill 



Hampshire 

 Connecticut 

 and easter 

 its similar 



reme 

 



nted 



ince 



weve 



P 



pop 



iden 



us 



and 

 w 



n M 



ity 



ly r a 

 nly t 

 sine 

 the 

 r , the 

 _ 1 

 ulatio 

 tif ied 

 var . 



Vermo 

 idely 

 inneso 

 to P. 



re, 



he N 



e 1 

 pla 

 f r u 



ater 



known in New Engla 

 ew Hampshire and Vermon 

 880. The Vermont po 

 mixed with 

 and the spa 

 distinctive . 

 in various 



nts grow 

 its differ 

 alls are 



P. lateralis var 



sig 



ns documented 



as 



tenuissimus 

 nt south to Massachusetts 

 scattered locations in New 

 ta. This species may be o 



vasey i . 



nd from five 



t locations have 



pulation is of 



the similar P_^ 



tulate floating 



The Danbury, 



herbaria which 



moides Eames are 



from 



Range extends from New 

 and northeastern 

 York, Michigan, 

 verlooked due to 



Rare and endangered plant lists; 

 Massachusetts, Connecticut 



New Hampshire, Vermont, 



alkalinity: mean 34.5 mg/1; range 13.5-55.0 mg/1 

 pH : mean 6.6; range 6.4-6.7 



21 



Potamogeton natans L. Fig. 23, Map 2 3 



Extremely common in New England. Range extends from 

 Newfoundland to Alaska, south to New Jersey, northern Indiana, 

 Nebraska, Colorado, Arizona, and southern California; reported 

 from one location in North Carolina where it evidently was a 

 short-lived introduction. 



alkalinity: mean 36.7 mg/1; range 2.5-245.0 mg/1 

 pH : mean 7.1; range 5.0-9.8 



