G46 



NAIADACE^. 



the above in habit, and as they are by no means an 

 interesting family of plants, easy to obtain, or pleasant 

 to examine, it is not thought necessary to describe their 

 characters in an elementary work like this. 



POTAMOGF.TON CENSUS (Opposite-leaved Pond-weed). 



2. EUPPIA. 



1. JR. maritima (Sea Euppia). The only species, 

 growing in salt-water ditches, distinguished from Pota- 

 mogeton pusillus by its spiral flower-stalks, and long- 

 stalked fruit. M. July August. 



