88 A CATALOG OF ILLINOIS ALGAE 



Transeau 1916, p. 124: Coles, Charleston — ponds (June, Sept., 

 Nov.). Johnson & Atwell 1890, p. 19: Cook, Evanston— in "Big 

 Ditch" (June). Tiffany 1930, p. 81; 1937, p. 37; 1939, p. 90. 



O. CAPITELLATUM Wittr. Tiffany, loc. cit., p. 76. pi. 20. f. 306, 307 



(1937). 



Tiffany 1930, p. 104; 1937, p. 76; 1939, p. 90. 



O. CARDIACUM (Hass.) Wittr. Tiffany, loc. cit., p. 31. pi. 9. f. 108 



(1937). 



Transeau 1913B, p. 82: Clark, Casey — pond and drain (May). 

 Coles, Charleston — ^ponds. Cumberland, Greenup — pond (May). 

 Jasper, Newton— pond. Tiffany 1930, p. 70; 1937, p. 31; 1939, 

 p. 90. 



O. CARDIACUM var. CARBONicuM Wittr. Tiffany, loc. cit., f. 121 (1937). 

 Transeau 1913B, p. 82: Clark, Casey — pond (Apr., Nov.). Coles, 

 Charleston, Lerna — ^ponds (Apr., May). Douglas, Arthur — pond 

 (May).. Jasper, Newton— pond (May). Tiffany 1930, p. 71; 



1937, p. 31. 



O. CONCATENATUM (Hass.) Wittr. Tiffany, loc. cit., p. 64. pi. 34. f. 538 



(1937). 



Transeau 1913B, p. 82: Coles, Charleston — pond (May). Brit- 

 ton: Cook, Glenview — pond and swamp about 1| miles W., 

 May 12, 1938, #53; Niles— small pond about 1 mile N., May 10, 



1938, #50. Tiffany 1930, p. 136; 1937, p. 64; 1939, p. 90. 



O. CONCATENATUM var. SUPERORNATUM Tiff. Tiffany, loc. cit. (1937). 

 Britton 1942, p. 58: Cook, Glenview — small ponds, intermittent 

 streams, and swamps about 1^-2 miles W., May 12, 1938, #56, 

 58; Northbrook — swamp on Landwehr Road about 3 miles 

 S.W., small ponds and swamps just E. and W. of Landwehr 

 Road at Techny Road, May 12, 1938, #60, 62, 63; Tech ny— pond 

 about 2 miles S.W., May 12, 1938, #64. Lake, Everett— small 

 pond about 1 mile S., May 15, 1938, #71. 



O. CRASSiuscuLUM Wittr. Tiffany, loc. cit., p. 66. f. 352 (1937). 

 Johnson & Atwell 1890, p. 19: Cook— "Big Woods" (Apr.). 



O. CRASSIUSCULUM var. cataractum (Wolle) Tiff. Tiffany, loc. cit., f. 



534 (1937). 



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

 1938, #71. 



O. CRENULATOCOSTATUM Wittr. Tiffany, loc. cit., p. 42. pi. 15. f. 204- 

 206 (1937). 



Transeau 1913B, p. 83: Clark, Casey — pond (Oct.). Coles, 



Charleston — in water and on crayfish in ponds (July, Oct.); 



Lerna — pond (Apr.). Jasper, Wheeler^ — pond (Aug.). Tiffany 



1930, p. 92; 1937, p. 42; 1939, p. 91. 



