130 A CATALOG OF ILLINOIS ALGAE 



S. WEBERi Kuetz. Collins, Tufts Coll. Stud. 2(3): 116 (1909). 



Solheim & Penfound 1928, p. 88: Champaign, Urbana^ — small 

 stream N. of (Mar.). Transeau 1913, p. 78; 1913C, p. 33: Clark, 

 Casey — pond (Apr.). Coles, Ashmore — pond (May), Polecat 

 Creek (Apr.); Charleston— ponds, ditches, Kickapoo Creek and 

 other small streams (Nov.-July). Edgar, Paris — reservoir (Apr.). 

 Effingham, Effingham — pond (May). Montgomery, Coffeen— 

 stream (May). 



ZYGNEMA Agardh, 1824 



Z. ADPECTINATUM Trans. Transeau et al., Trans. Amer. Mic. Soc. 53: 



209. pi. 17. f. 6 (1934). 



Transeau 1934, p. 209. 



Z. AZUREUM Taft. Trans, et al., loc. cit., p. 214. pi. 17. f. 3 (1934). 

 Transeau 1934, p. 214: Coles, Ashmore— (Apr.). 



Z. CATENATUM Trans. Transeau et al., loc. cit., p. 213 (1934). 

 Zygnema cruciatum var. coeruleum Trans. 



Transeau 1915, p. 22; Collins 1918, p. 8, as Z. c. var. coeruleum; 

 Transeau et al. 1934, p. 213: Clark, Casey — pond. 



Z. COLLINSIANUM Trans. Transeau, Amer. Jour. Bot. 1: 289. pi. 25. 



f. 1-3 (1914). 



Transeau 1913B, p. 74; 1914, p. 289; Collins 1918, p. 8: Clark, 

 Briscoe, Casey, Oilfield — ponds and ditches (Apr., May). Cum- 

 berland, Bradbury— pool (Apr.). 



Z. CONSPICUUM (Hass.) Trans. Transeau et al.. Trans. Amer. Mic. 



Soc. 53: 208. pi. 17. f. 2 (1934). 



Zygnema pectinatum var. conspicuum (Hass.) Kirch. 



Transeau 1915, p. 21 ; Collins 1918, p. 7, as Z. p. var. conspicuum: 

 Transeau et al. 1934, p. 208. 



Z. CRUCIATUM (Vauch.) Ag. CoHins, Tufts Coll. Stud. 2(3): 104 



(1909). 



Transeau 1915, p. 21: Coles, Charleston — ponds (Apr.-Nov.). 

 Transeau: Montgomery, Coffeen — pond (May). 



Z. CYLINDRICUM Trans. Transeau, Ohio Jour. Sci. 16: 22 (1915). 



Transeau 1915, p. 22; Collins 1918, p. 8: Coles, Ashmore— pond 

 (Apr.). 



Z. DECUSSATUM (Vauch.) Trans. Transeau, Amer. Jour. Bot. 1: 290 



(1914). 



Transeau 1914, p. 290; Collins 1918, p. 8: Clark, Casey— ponc^ 

 (July); Oilfield — ditch (May). Coles, Ashmore, Charleston — 

 ponds and pools (May-Nov.). Douglas, Arthur— pond (July). 

 Lawrence, Lawrenceville — Beaver Ditch (Aug.). Montgomery, 

 CofTeen — pond (May). Moultrie, Sullivan — pond (July). 



