28 A CATALOG OF ILLINOIS ALGAE 



NODULARIA Mertens, 1822 



N. HARVEYANA var. SPHAEROCARPA (B. & F.) Elenk. Geitler, loc. cit., 

 p. 865. f. 552 (1932). 



Nodularia sphaerocarpa B. & F. 



Transeau 1913B, p. 71, as N. sphaerocarpa: Coles, Chareston — 



floating masses in pool 4 miles N. of (May). 

 N. SPUMIGENA Mert. Geitler, loc. cit., p. 866 (1932). 



Transeau: Coles, Lerna — pond (May). 



NOSTOC Vaucher, 1803 



N. CARNEUM Ag. ex B. & F. Geitler, loc. cit., p. 839. f. 530 (1932). 

 Transeau 1913B, p. 71 : Coles, Embarrass — shallow pool on rocks 

 at limestone quarry (Nov.). 



N. ELLiPsosPORUM Rab. ex B. & F. Geitler, loc. cit., p. 841. f. 533 



(1932). 



Drouet, Field Mus. : Cook, Chicago — Univ. of Chicago green- 

 house, subaerial on sides of watertank, coll. by P. D. Voth, 

 J. M. Beal and F. Drouet, Oct. 5, 1938; floating in tank, coll. by 

 D. Richards, Feb. 18, 1939. 



N. MUSCORUM Ag. ex B. & F. Geitler, loc. cit., p. 844. f. 535 (1932). - 

 Transeau 1913B, p. 71: Coles, Charleston — pools ("summer"). 



N. PRUNiFORME (L.) Vauch. ex B. & F. Geitler, loc. cit., p. 860. f. 548 



(1932). 



Forbes 1883A, p. 495; Atwell 1889, p. 291; Johnson & Atwell 

 1890, p. 21; Johnson (Field Mus.); Tilden 1910, p. 178: Cook, 

 Evanston — Lake Michigan (Aug.-Apr.). 



N. SPONGIAEFORME Ag. ex B. & F. Geitler, loc. cit., p. 839. f. 531 



(1932). 



Drouet, Field Mus.: Cook, Evanston — coll. by L. N. Johnson. 



N. VERRUCOSUM Vauch. ex B. & F. Geitler, loc. cit., p. 854. f. 43,542,- 



543 (1932). 



Johnson & Atwell 1890, p. 21; Tilden 1910, p. 179: Cook, Bow- 

 manville — (July). 



Family: SCYTONEMATACEAE 

 PLECTONEMA Thuret, 1875 



P. NOSTOCORUM Born. ex Gom. Geitler, loc. cit., p. 692. f. 445 (1932). 



Britton: Cook, Palos Park — smal,l pond at Palos Golf Club, 



Sept. 8, 1939, #1005 (Jide Dr. F. Drouet). 

 P. TOMASINIANUM Born. ex Gom. Geitler, loc. cit., p. 688. f. 442 

 (1932). 



Solheim & Penfound 1928, p. 87: Champaign, Urbana — small 



stream N. of (June). 



