CATALOGUE OF PLANTS. 419 



C. sexang-ulare, Lund. 



Morris : Split .Rock Pond. 

 C. depressum (Nasg.), Lund. 



MOD mouth : Pond at Spring Lake. 

 C. obsoletum, Reinsch. 



Mon mouth : In a sluggish stream, Ocean Grove. 

 C. Meneg-hinii, Breb. 



In ponds ; frequent. 

 C. polyg-onum, Neeg. 



In ponds; occasional. 

 C. lunatum, Wolle. 



Burlington : Brown's Mills. 

 C. Smolandicum, Lund. 



In ponds ; frequent. 

 C. undulatum, Corda, var. crenulatum, Wolle. 



Same habitat. 

 C. crenatum, Ralfs. 



In ponds ; occasional. 

 C. venustum, Rab. 



Same habitat. 

 O. Reinschii, Archer. 



Morris : Lake Hopatcong. 

 C. pyramidatum, Breb. 



In ponds; common. 

 Var. stenonotum, Nordst. 



Union : Pond near Plainfield A. D. Balen. 

 C. Ralfsii, Breb. 



In ponds ; occasional. 

 C. pachydermum, Lund. 



Morris : Budd's Lake. 

 C. galeritum, Nordst. 



In springs and ponds. 

 C. polymazum, Nordst. 



Morris : Denmark Pond. 



