CLASSIFIED CATALOG OF ILLINOIS ALGAE 45 



F. viRESCENS Ralfs. Boyer, Proc. Acad. Nat. Sci. Phila. 78 (Suppl. 1) : 



184 (1927). 



Briggs 1872A, p. 43; Thomas & Chase 1887, p. 328; Eddy 1927B, 

 pp. 208, 214, 219: Cook, Chicago— Lake Michigan (Apr.-Dec). 

 Forbes & Richardson 1913, p. 505: Grundy, Dresden Heights — 

 DesPlaines River. Kofoid 1903, p. 516; 1908, pp. 35, 43, 50, 292, 

 317: Mason, Havana — Illinois River (all months); Topeka — 

 Quiver Creek (Mar., Apr., Nov., Dec). Eddy & Simer 1929 

 p. 62: Morgan, Meredosia — Illinois River. 



SYNEDRA Ehrenberg, 1830 



S. Acus Kuetz. Boyer, loc. cit., p. 201 (1927). 



Transeau: Coles, Charleston— small streams and ponds (Dec, 

 Jan., May). Kofoid 1903, p. 513; 1908, pp. 35, 43, 58, 292, 318, 

 319: Mason, Havana — Illinois River and seepage areas on river 

 bank (all months); Topeka — Quiver Creek (Oct.-Apr.). 



S. ACUS var. radians (Kuetz.) Hust. Hustedt in Rab., Kryptog.-fl. 



Deutsch 7(2): 202. f. 693b (1932). 



Synedra acus var. delicatissima W. Smith ; Synedra delicatissima W. 

 Smith; Synedra radians Kuetz.; Synedra tenuissima Kuetz. 



Thomas & Chase 1887, p. 330, as 5. delicatissima (Cook). 

 Kofoid 1908, pp. 43, 58, as S. a. var. delicatissima (Mason). 

 Purdy 1922, p. 53, as S. delicatissima (Massac, Pope). Galtsofif 

 1924, pp. 399, 402, 404, 410, as 5. delicatissima (Carroll, Han- 

 cock, Henderson, Jo Daviess, Mercer, Rock Island, Whiteside). 

 Eddy 1927B, p. 208, 214, 220, as 6". tenuissima (Cook). Purdy 

 1930, p. 134, as S. delicatissima and S. radians (Peoria, Will). 

 Eddy 1931A, pp. 480, 483, 486 (Cass, Macon, Menard, Sanga- 

 mon) ; 1931B, p. 453, 460, as S. tenuissima (Pulaski). Daily 1938, 

 p. 79, as S. radians (Cook). Transeau, as S. delicatissima (Clark, 

 Coles). 



Carroll — Mississippi River (July, Sept.). Cass, Chandlerville 

 — Sangamon River (July, Sept.). Clark — Whetstone Creek 

 (Oct.). Coles, Charleston — pond (Oct.); Wrightsville — in a 

 spring (Apr.). Cook, Chicago, Evanston^ — Lake Michigan (May, 

 July, Nov.). Hancock, Dallas City— Lake Keokuk (Mississippi 

 River) (July-Sept.). Henderson, Jo Daviess— Mississippi River 

 (July-Sept.). Macon, Decatur — Lake Decatur (June, July); 

 Harristown — Sangamon River (July). Mason, Havana — Illinois 

 River. Massac^ — Ohio River (Aug.-Oct.). Menard, Petersburg — 

 Sangamon River (June, July, Sept.). Mercer, New Boston — 

 Mississippi River (July-Sept.). Peoria, Peoria — Illinois River 

 (Dec-Feb.). Pope— Ohio River (Aug.-Oct.). Pulaski, Wetaug — 

 sink-hole pond (Dec). Rock Island — Mississippi River (July- 



