Myxophyceae 199 



Buchanan. Notes on the Algae of Iowa. Proc. Iowa Acad. Sci. 14: 12. 

 1908. 



Plate X. fig. 3. 



Plant mass gelatinous, blue-green, sometimes tinged on the edges with 

 brown; trichomes 3 mic. in diameter, flexuous, equal, intricate, not spiral; 

 cells short cylindrical, equal to or more than twice as long as the diameter, 

 usually separated; apical cells somewhat spherical; gonidia 10-12 mic. in 

 diameter, 23-24 mic. in length, oblong-cylindrical, granular, yellowish brown; 

 wall of gonidium thick, distinctly granulate; cell contents granular, pale 

 blue-green. 



Canada. Growing upon the ground in the marshes which border the 

 Niagara River, just above the Canadian Falls. (Wood). Iowa. Frequent 

 on wet soil along brooks. Grinnell. (Fink). 



366. Cylindrospermum majus Kuetzing. Phyc. Gen. 212. 1843. Bornet and 



Flahault. Revis. des Nostoc. Ann. Sci. Nat. Bot. VII. 7: 252. 1888. 

 De Toni. Syll. Algar. 5 : 474. 1907. 



Collins. Algae of Middlesex County. 14. 1888. Collins, Holden and 

 Setchell. Phyc. Bor.-Am. Ease. 3. no. 106. 1895. Setchell. Notes on Cyano- 

 phyceae. — III. Erythea. 7: 51. 1899. Collins, Holden and Setchell. Phyc. 

 Bor.-Am. Ease. 15. no. 708. 1900; Ease. 23. no. 1108. 1903. Collins. Phyco- 

 logical Notes of the late Isaac Holden.— II. Rhodora. 7: 236. 1905. 



Plate X. fig. 4. 



Plant mass widely expanded, mucous, blackish green; trichomes 4-5 

 mic. in diameter, constricted at joints; cells 5-6 mic. in length, cylindrical; 

 heterocysts a little wider than the cells, up to 10 mic. in length, oblong, 

 pale; gonidia 10-15 mic. in diameter, 20-38 mic. in length, ventricose-ellip- 

 tical; wall of mature gonidium rough, punctate. 



Maine. Not immersed, but forming gelatinous masses on steep bank 

 above the shore. South Harpswell. July 1903. (Collins). Massachusetts. 

 Newton. (Farlow). On walls of B. and A. R. R. tunnel. (Wood). Con- 

 necticut. Investing grasses, Utricularia, etc., in still water. Pool below 

 Factory Pond, Bridgeport. September 1891. (Holden). California. In a 

 slow stream near Pasadena. (McClatchie). 



367. Cylindrospermum minutum Wood. Contr. Hist. Fresh-Water Algae 



North America. 39. pi. 2. f. 6. 1872. De Toni. Syll. Algar. 5: 475. 

 1907. 



Wolle. Fresh-Water Algae U. S. 292. pi. 199. f. 11. 1887. (C. 1 i m n i- 

 c o 1 a Wolle). Wolle and Martindale. Algae. Britton's Catalogue of 



Plants found in New Jersey. Geol. Surv. N. J. 2: 607. 1889. Bessey. 



Miscellaneous Additions to the Flora of the State. Bot. Surv. Nebraska. 

 46. 1893. Saunders. Protophyta-Phycophyta. Flora of Nebraska. 19. pi. i. 

 f. II. 1894. Tilden. List of Fresh-Water Algae collected in Minnesota 

 during 1893. Minn. Bot. Studies, i: 31. 1894. 



