221 PRELIMINARY CATALOGUE OF PLANTS. 



Gloiotrichia, (Rivularia,) Ag. 

 G. pisum, Ag. Ponds. 

 G. natans, Thur. Ponds. 



Rivularia, Roth. 



R. radians, Thur. Frequent in ponds. 



Isactis, Thur. 



I. fluviatilis, Kg. Green Pond. 



Scytonema, Ag. 



S. Austinii, Wood. Little Falls. 

 S. calotrichoides, Kg. 



Var. natans, Rabh. Brown's Mills, etc. 

 S. cinereum, Menegh. Goodwinsville. 

 S. gracile. Kg. Morris Pond, etc. 

 S. myochrous, Ag. Closter. 

 S. Naegeli, Kg. Goodwinsville and Closter. 

 S. natans, Breb. Hammonton. 

 S. truncicola, Rabh. Bergen Co. 

 S. tolypotrichoides. Kg. Wet rocks. Not unfrequent. 



Symphyosiphon, Kg. 



S. Hofmanni, Kg. Moist earth and rocks. 

 S. tenuis, Kg. Palisades. 



Tolypothrix, Kg. 



T. segagropila, Kg. Frequent. 



T. distorta. Kg. Ponds. 



T. bombycina, Wolle. Growing on rocks, Lake Hopatcong. 



Sirosiphon, Kg. 



S. ocellatus, Kg. Frequent in swampy places. 

 S. compaetus, Ag., Kg. Moist rocks. 

 S. pulvinatus, Breb. Moist rocks. 

 S. coralloides, Kg. Green Pond, etc. 



Hapalosiphon, Naeg. 



H. Braunii, Naeg. Atsion, etc. 

 H. fuscescens, Kg. Frequent in ponds. 

 H. Brebissonii, Kg. Moist earth. 

 H. tennissimus, Grun. Ponds. 



Nostoo, Vauch. 



N. spheroides, Kg. 

 N. rupestre, Kg. 



