28 MINNESOTA BOTANICAL STUDIES. 



lake, Hennepin county, Minnesota. Coll. Miss M. 

 G. Fanning and H. B. Humphrey. October 28, 1897. 



VAGINARIEAE Gomont in Morot, Journ. de Bot. 4:351. 

 1890. 



257. Schizothrix rupicola Tilden. Am. Alg. Cent. II. no. 



175. 1896. Bot. Gaz. 23: 95-104. pi. 7-9. F. 1897. 

 Bare and dry sandstone cliffs. Soldiers' Home, Min- 

 nehaha Falls, Minnesota. Coll. C. W. Hall. Sep- 

 tember 28, 1896. 



258. Schizothrix lardacea (Cesati) Gomont. Monogr. des 



Oscill. in Ann. Sci. Nat. Bot. VII. 15: 311. pi. 8. f. 

 8, 9. 1892. 

 In a large bottle of distilled water left standing for 

 several months. Botanical laboratory. University of 

 Minnesota, Minneapolis, Minnesota. 1896. Det. 

 by Gomont. 



LYNGBYEAE Gomont Ess. class des Nostocacees homocystees 

 in Morot Journ. de Bot. 4: 353. 1890. 



259. Lyngbya martensiana Menegh. var. calcarea Tilden. 



Am. Alg. Cent. II. no. 178. 1896. Bot. Gaz. 

 23: 95-104. pi. 7-9. F. 1897. 

 With no. 240. Minneapolis, Minnesota. October i, 

 1895. 



260. Lyngbya nana Tilden. Am. Alg. Cent. II. no. 179. 



1896. Bot. Gaz. 23: 95-104. pi. 7-9, F. 1897. 

 With no. 240. Minneapolis, Minnesota. October i, 

 1895. 



261. Phormidium valderianum (Delp.) Gomont Monogr. 



des Oscill. in Ann. Sci. Nat. Bot. VII. 16: 167. pi. 



4. f. 20. 1892. 

 In arm of Mississippi river (old channel), St. Paul 



Park, Minnesota. Coll. E. M. Freeman, October 



3. 1897. 

 With Oscillatoria geminata, O. tenuis var. tergestma, 



Phormidium valderianum^ and species of Chroococ- 



cus^ Palmellaceae, Coccochloris^ Rha^hidium^ Poly-, 



cystis and Scenedemus. Det. by Gomont. 



262. Oscillatoria geminata Menegh. Consp. Algol, euganeae. 



9. 1837. 

 With no. 261. 



