CLASSIFIED CATALOG OF ILLINOIS ALGAE 21 



O. AMOENA (Kuetz.) Gom. Geitler, loc. cit., p. 969. f. 603a, 611k 

 (1932). 



Solheim & Penfound 1928, p. 86: Champaign, Urbana — small 



stream N. of (July). 



O. ANiMALis Ag. ex Gom. Geitler, loc. cit., p. 978. f. 603a (1932). 

 Solheim & Penfound 1928, p. 86: Champaign, Urbana— small 

 stream N. of (July). 



O. ARTicuLATA Gard. Geitler, loc. cit., p. 963. f. 614 (1932). 



Drouet, Field Mus.: McHenry, Crystal Lake — on Potomogeton 

 sp. in Crystal Lake, coll. by H. C. Benke, June 17, 1939. 



O. CHALYBEA Mert. ex Gom. Geitler, loc. cit., p. 956. f. 608b (1932). 

 Oscillatoria subsalsa Ag. 



Solheim & Penfound 1928, p. 86, as O. subsalsa: Champaign, 

 Urbana — small stream N. of (July-Oct.). 



O. CHLORINA Kuetz. ex Gom. Geitler, loc. cit., p. 951. f. 611c (1932). 

 Solheim & Penfound 1928, p. 86: Champaign, Urbana — small 

 stream N. of (May, June). Johnson & Atwell 1890, p. 21: Cook, 

 Evanston — in a small stream. 



O. CURVICEPS Ag. ex Gom. DeToni, Sylloge Algarum 5: 157 (1907); 



Geitler in Rab., Kryptog.-fl. Deutsch. 14: 947. f. 598e (1932). 

 Oscillaria froelichii var. viridis Zell. 



Solehim & Penfound 1928, p. 86: Champaign, Urbana — small 

 stream N. of (Apr., May). Johnson & Atwell 1890, p. 21, as 

 Oscillaria froelichii var. viridis: Cook, Evanston— in a small 

 stream (Mar.). 



O. FORMOSA Bory ex Gom. Geitler, loc. cit., p. 970. f. 619b (1932). 

 Solheim & Penfound 1928, p. 86: Champaign, Urbana — small 

 stream N. of (May, Aug.). Transeau 1913B, p. 70: Clark, Casey 

 pond (Oct.); Coles, Charleston — laboratory aquarium (Apr.). 

 Britton: Cook, Palos Park— swamp, Sept. 8, 1939, #975 (fide Dr. 

 F. Drouet). 



O. GEMiNATA Menegh. ex Gom. Geitler, loc. cit., p. 965. f. 61 li (1932). 

 Solheim & Penfound 1928, p. 86: Champaign, Urbana — small 

 stream N. of (Apr.-Aug., Oct.). 



O. LIMOSA Ag. ex Gom. Geitler, loc. cit., p. 944. f. 598d (1932). 



Johnson & Atwell 1890, p. 21 (Cook). Forbes & Richardson 1913, 

 pp. 502, 503, 506, 513, 520, 535 (Grundy, LaSalle, Peoria, Will). 

 Transeau 1913B, p. 70 (Coles). Solheim & Penfound 1928, p. 86 

 (Champaign). Agersborg 1930, pp. 103, 104, 106-110, 113, 114 

 (Macon). Drouet, Field Mus. (Cook). Transeau (Clark, Law- 

 rence). 



Champaign, Urbana — small stream N. of (Feb.-June, Nov., 

 Dec). Clark, Casey— pond (Oct.); Westfield— ditch (June). 

 Coles, Ashmore — creek and cut-offs (Oct.); Charleston, Kicka- 

 poo Creek and other small streams, ponds and ditches (all 



