114 PLANTS OF RHODE ISLAND. 



Sub-Okder CYANOYHPYCE^. 



NostocacecB. 

 MASTIGONEMA, (Fisher,) Kirch, 

 seruginosum, (Kg.) Kirch. Easton's Pond, Newport, &c. 



GLOEOTRICHIA, Ag. 

 natans, Thur. Prof. J. }V. Bailey, sub Rivularia angulosa, 

 Koth. 



RIVULARIA, Kg. 

 dura, Kg. Not uncommon. 



SCYTONEMA, Ag. 



1. natans, Breb. Quidnessett, &c. 



2. gracile. Kg. N. Providence. 



TOLYPOTHRIX, Kg. 

 distorta, Kg. Worden's Pond, Prof. J. W. Bailey. No. 111. 



SIROSIPHON, Kg. 



1. pulvinatus, Breb. Pocasset Brook. 



2. ocellatus, Kg. Quidnessett. 



HAPALOSIPHON, Naegr. 



1. fuscescens, Kg. Spectacle Pond. 



2. tenuissinaus, Grun. Blackamore Pond. 



N O S T O C , Vauch. 



1. commune, Vauch. Common. 



2. sphaericum, Vauch. Providence. 



3. rupestre. Kg. Providence. 



ANAB^NA, Bory. 



1. flos-aquae, Kg. Very common. 



2. gigantea, Wood. Providence, Mr. Lathrop ; R. W. Park. 



3. oscillarioides, Bory. Roger Williams Park. 



SPH^ROZYGA, (Ag.)Ralfs. 



polysperma. Kg. Spectacle Pond, &c. 



L Y N G B Y A , * Ag. et Thuret. 



1. obscura. Kg. Pocasset. 



2. vulgaris, (Kg.) Kirch. Very common. 



3. Retzii, (Ag.) Kg. Geneva. 



4. interrupta, (Kg.) Neutakonkanut. 



5. inundata, (Kg.) Geneva. 



6. "WoUei, Farlow. Providence, &c. 



*See also under Marine Algas, p. 94. 



