222 PEELTMINARY CATALOGUE OF PLANTS. 



N. cseruleum, Lyng. 



N. commune, Vauch. 



N. cristatum, Bail-Alpinum, Kg. 



N. comminul.um, Kg. 



These and other varieties are not infrequent. 



In the Bulletin of the Torrey Botanical Club, April, 1879, I noted, 

 "A Nostoc the matrix of Scytonema." The probability is that many 

 of the recorded forms are mere varying phases of the same, and that 

 all the Nostocs are undeveloped forms, representatives of arrested or 

 intermediate life conditions of higher stages of development. 



Anabeena, Bory. 

 A. flosaqua, Kg. 



A. circinalis, Rabh. Probably a variety of the former ; frequent ; 

 very abundant at Dennisville. 



Trichormus, Allman. 



T. incurvus, Allman. On bark of old logs in swamp near Closter. 



Sphserozyga, Ag. 



S. polysperma, Kabh. Bound Brook, etc. 

 S. saccata, Wolle. Cranberry Pond. 



Cylindrospermum, Kg. 



C. macrosporum, Kg. Wet places, old vifood, etc. 



Lyngbya, Ag. 



L. aeruginosa. Perth Amboy, etc. 



L. ^stuarii, Jurg. Near sea coast. 



L. Wollei, Farlow. Lake Hopatcong, Swartwout Pond. 



Li. obscura. Ponds. 



Symplooa, Kg. 



S. lucifuga, Harv. Bergen Co. 



Microcoleus, Desm. 



M. terrestris, Desm.=Chthonoblastus Vaucheri, Kg.=Ch. repens, 

 Kg. Moist earth. 



Inactis, Kg. 



I. Austinii, Wolle. Little Falls. 

 Oscillaria, Boso. 



O. brevis, Kg. Marshes. 



O. Froelichii, Kg. Cape May Co., etc. 



