NOTES ON CYANOPHYCE^. 51 



ellipsoidal, and possess a smooth, brown membrane. They are pro- 

 duced in abundance in older plants. 



This species very strongly resembles Nostoc verrucosum (L.) 

 Vaucher in habit and habitat, but reaches a much larger size and 

 has trichomes which are always distinctly torulose instead of being 

 most distinctly cylindrical, as is the case in N. verrucosum. 



The types of the species are several plants chosen from some 

 ninety specimens collected all at the same time and place by Prof, 

 McClatchie and seemingly exactly the same. What appears to be 

 the same species has been collected in quantity by the writer at 

 Hollister, California. The specimens were found in all stages of 

 development, growing in watering troughs supplied from artesian 

 wells. Sets from both localities will be distributed in the twelfth 

 fascicle of the Phycotheca Boreali- American a. 



Ann bce7ia variabilis Kuetz. was mentioned by the writer as being 

 new to North America in 1895 (cf Bull. Torrey Botan. Club, 22, 

 429). It has also occurred to him at San Francisco, California. 

 Miss Tilden has distributed under this name (cf American Algae, 

 No. 169) three specimens, all of which are Nostocs of the Intricata- 

 group. No. 169b is N. Linckia but the other two are not so 

 readily determinable. They seem most like N. piscinale. 



Anahczna oscillarioicles Bory, while not credited to North America 

 by Bornet and Flahault, except as to the variety stenospora, is 

 probably not uncommon. The writer has it from Woods Hole, 

 Mass. (J. E. Humphrey and K. Miyabe), from Bridgeport, Conn. 

 (Isaac Holden), from Evanston, 111. (L. N. Johnson), from Helena, 

 Montana (F. D. Kelsey), and from San Francisco, California 

 (W. A. S.). Miss Tilden has distributed it under the name of 

 Nostoc spongiceforyne from St. Paul, Minn, (cf American Algae, No. 

 83), but her number 87 is clearly Cylindrospermum majxis although 

 labeled A. oscillarioides. 



Cylindrospermum mnjus Kuetz. is probably common over the 

 entire country. It often appears in American collections under the 

 name of C. flezunsum, a name given to it by Wolle. He hns dis- 

 tributed it under that name as No. 57 of his distril)ution. It is also 

 No. 87 of Miss Tilden's American Algae as mentioned above. Speci- 



