90 • A CATALOG OF ILLINOIS ALGAE 



O. DECIPIENS var. AFRICANUM Tiff. Tiffany, loc. cit., f. 386 (1937). 

 Britton: Cook, Northbrook — small intermittent pond and 

 swamp at Somme Forest Preserve, May 15, 1938, #66. 



O. DECIPIENS var. dissimile (Hirn) Tiff. Tiffany, loc. cit., f. 384, 385 



(1937). 



Tiffany 1937, p. 68. 



O. DiVERSUM (Hirn) Tiff. Tiffany, loc. cit., p. 37. pi. 12. f. 16o, 167 



(1937). 



Britton: Lake, Everett- — small pond about 1 mile S., May 15, 

 1938, #71. 



O. ECHiNOSPERMUM A. Br. Tiffany, loc. cit., p. 57. pi. 31. f. 487 (1937). 

 Transeau 1913B, p. 83; 1916, p. 124: Clark, Oilfield— ponds 

 (Apr., May). Coles, Ashmore, Charleston, Lerna — ponds and 

 ditch pools (Apr., May). Johnson & Atwell 1890, p. 19: Cook, 

 Lakeside— (May). Tiffany 1930, p. 121; 1937, p. 57; 1939, p. 91. 



O. EPiPHYTicuM Trans. & Tiff. Tiffany, loc. cit., p. 50. pi. 21. f. 319, 



320 (1937). 



Oedogonium pisanum var. gracilis Trans. & Tiff. 



Transeau & Tiffany 1919, p. 241, as 0. p. var. gracilis; Tiffany 

 1930, p. 110, as 0. p. var. gracilis; 1937, p. 50; 1939, p. 91: 

 Montgomery, Coffeen — pond (May). 



O. FLAVESCENS Wittr. Tiffany, loc. cit., p. 59. pi. 32. f. 517 (1937). 

 Britton: Cook, Northbrook — small pond at Somme Forest Pre- 

 serve, May 15, 1938, #65; Techny — small pond about 2 miles 

 S.W., May 12, 1938, #60. 



O. FRAGILE Wittr. Tiffany, loc. cit., p. 2>Z. pi. 10. f. 132 (1937). 



Transeau: Coles, Charleston — pond (May). Tiffany 1930, p. 75; 



1937, p. d>2>; 1939, p. 91. 



O. FRAGILE var. ABYSSINICUM Hirn. Tiffany, Oedog. Monog., p. 75 



(1930). 



Britton 1942, p. 58: Cook, Glenview — temporary pond in swamp 

 about \\ miles W., May 12, 1938, #56; Northbrook — small pond 

 in Somme Forest Preserve, May 15, 1938, #68; small pond and 

 swamp on Techny Road just E. of Landwehr Road, May 12, 



1938, #62; Techny— swamp about 2 miles S.W., May 12, 1938, 

 #60. 



O. FRANKLINIANUM Wittr. Tiffany, N. Am. Fl. 11: 31. pi. 8. f. 84 



(1937). 



Transeau 1913B, p. 83: Coles, Charleston — ponds (June, July, 

 Oct.). Cumberland, Greenup — pond (July). Tiffany 1930, p. 71; 

 1937, p. 31; 1939, p. 91. 



O. GLOBOSUM Nordst. Tiffany, loc. cit., p. 32. pi. 9. f. 120 (1937). 



Transeau 1913B, p. 83: Coles, Charleston, Lerna — ponds (Oct., 

 May). Jasper, Newton— pond (May). Tiffany 1930, p. 74; 1937, 

 p. 32; 1939, p. 91. 



