216 Illinois State Laboratory of Natural History. 
19-24 »; teleutosori scattered or united in groups, often very 
numerous and sometimes confluent, low, at first orange-yellow, 
changing to pale reddish brown; teleutospores about four-celled. 
cylindrical or enlarged above, epispore thin, smooth. 
" Uredo sonchi-arvensis. Crowded, subconfluent, fulvous, sori nearly 
plane, irregular. Hab.: frequent in autumn on leaves of Sonchus ar- 
vensis in fields after harvest.—Persoon, Syn. Fung., p. 217. 
On leaves of Vernonia fasciculata: Tazewell, July 22, 
2491, II.; Champaign, Aug. 11, 1023, IL, III.; Piatt, Aug. 15, 
1070, IJ., TIT.. Aug. 17, 1111, IL, TI.; McLean, Sept. 6, 5671, 
II., IU, Oct. 6, 1810, IT., ITT., Oct. 18, 1862, IT., III.; LaSalle, 
Sept. 14, 1545, IT., TIL., Sept. 29, 6240, IIT.; JoDaviess, Sept. 
15, 5911, .; Jersey, Oct. 18, 6296, II., ITT.; Jackson, Oct. 22, 
1955, IT., IIL.; Union, Oct. 24, 1970, 1984, IT., TIT., 1985, IT., 
ITL., 1986, IT., III., Oct. 26, 2084, Oct. 27, 2067, II. III; Pu- 
laski, Nov. 4, 2233. Elephantopus Carolinianus: Union, Oct. 
26, 2088, II., UI. Aster sagittifolius: Jackson, April 21, 4218. 
II.; Pulaski, May 5, 4508, II., 4509, II., May 6, 4532, I1., May 
10, 4592, [I.; McLean, July 12, 2488, IL, July 15, 2486, IT., 
July 29, 2487, IL, Aug. 1, 2463, IL, III., Aug. 6, 2485, IT., 
2489, IT., Oct. 18, 1885, II., I1I.; McHenry, Aug. 20, 1162, IL; 
LaSalle, Sept. 13, 1507, IT.; Stephenson, Sept. 13, 5823, II.. 
Sept. 14, 5881, IL., IIT., JoDaviess, Sept. 16, 5950, IL; Rock 
Island, Sept. 27, 1685, IL.; Fulton, Oct. 3, 1741, II. Aster sps.: 
Jackson, April 25, 4292, II.; Johnson, May 12, 4650, II.; Adams, 
July 11, 5499, IT., 5500, II.; McLean, Aug. 1, 2490, II.; Piatt. 
Aug. 10, 1008, II.; McHenry, Aug. 24, 1283, II.; Cook, Sept. 6, 
1452, I.; JoDaviess, Sept. 19, 5998, II.; Fulton, Oct. 3, 1736, 
IL., HL.; Union, Oct. 21, 1906, IL, III. Solidago latifolia: Mc- 
Lean, Aug. 1, 2481, IL, Aug. 6, 2488, IT., 2484, IT., Oct. 12, 
1853, IL., WI. S. altissima: Adams, July 1, 5378, IT., July 3, 
5386, II., July 7, 5448, [1.; Lee, Sept. 9, 5752, II. S. wlmifolia: 
McLean, Aug. 6, 2482, IT.; LaSalle, Sept. 17, 1570. S. Cana- 
densis: Adams, July 11, 5498, II.; McLean, July 12, 2479, ITL., 
July 15, 2478, IT., 2480, ID., IIL, July 16, 2477, ID, Aug. 6, 
2476, IL, Oct. 18, 1879, I.; McHenry, Aug. 20, 1178, IL, Aug. 
24, 1279, II.; Stephenson, Sept. 18, 5817, II.; Rock Island, 
Sept. 24, 1619, IT., IIT., Sept. 27, 1684, IT., III.; Fulton, Oct. 3, 
1743, IL.; Union, Oct. 25, 2006, IT., III, Oct. 27. 2060, IT., 
