Parasitic Fungi of Illinois. 217 



:>OW, IT., Nov. 1, 2205, II., Nov. 4, 2278, II. S. gigantea: Mc- 

 Lean, Sept. 6, 5672, II. Solidago sps. : Union, April 26, 4312, 

 II., April 29, 4393, II.; Pulaski, May 3.4466, II.; Adams, June 

 26. 5289, II., July 5, 5418, II.; Piatt, Aug. 15, 1077, II., Aug. 

 17, 1112, II.; Ogle, Sept. 26, 6187, II.; Union, Oct. 21, 1912, II. 

 Silphium inteyrifolinm : Union, Sept. 22, II., III., (Earle.) 

 S. terebinthinaceum : Jersey, Oct. 13, 6298. Helianthns: Piatt, 

 Aug. 17, 1130; Jersey, Oct. 13, 6297, II., III., Oct. 14, 6311; 

 McLean, Oct. 12, 1847, II., III., Oct. 18, 1878. 



Nos. 1912, 2006, 2060, 2205, 2481, 5817, 5881, 5950 and 

 6187 are accompanied by pycnidia of Dothidea solidaginis. 



The name adopted is from Uredo sonchi-arvensis, Persoon. 

 For the fungi here included many names have been proposed 

 under the idea of specific distinctness. But whatever differ- 

 ences exist seem to be so connected by intermediate forms .that 

 those upon the host-plants named are considered specifically 

 identical. There are, therefore, included such as have been 

 named Uredo Solidaginis^ Schw., U. terebinthini, Schw., Coleo- 

 sporium compositarum, Lev., Uredo or Cceoma elephantopodis, 

 Schw., Coleosporium Vernonice, B.&C. ; and C. Solidaginis, Thiim. 

 Perhaps the form on Vernonia differs more than others from 

 the type on account of the uredospores being smaller, and the 

 teleutospores being more enlarged above. On Elephantopus 

 the teleutosori are grouped in circles. 



C. ipomceae, (Schw.) 



II., III. Hypophyllous. Spots yellowish or none; sori 

 minute, scattered or irregularly clustered, circular. II. Spores 

 irregularly oval, strongly echinulate, 18 by 26 /*. III. Sori 

 convex, deep reddish orange; spores (chains) oblong or slightly 

 clavate, conspicuously 4-6-septate, about 10 by 26 /*, segments 

 widest transversely. 



On leaves of Ipomva Nil: Union, Oct. 31, 2133, II., III.; 

 Jackson, Nov. 5, 2265, II., III. /. lacunosa: Union, Oct. 31, 

 2134, II.. III. I. pandurata: Tazewell, July 22, 2462, II., III.; 

 McLean, July 29, 2292, II., III., Oct. 13, 1861, II., III.; Piatt, 

 Aug. 15, 1068, II., Ill, Aug. 17, 1108, II.. III., 1136, II, III.; 

 Jersey, Oct. 12, 6271, II, III. 



This is evidently the plant named Uredo ipomoece by 



