Parasitic Fungi of Illinois. 193 



light brown, naked teleutosori black; uredospores subglobose, 

 finely echinulate, 18-21 by 21-30 ^; teleutospores clavate-obo- 

 vate, constricted, obtusely rounded above, but sometimes hav- 

 ing a thickened and angular apex, narrowed below to the thick 

 pedicel, smooth, 22-27 by 42-54 /it; pedicel stout, colored, 

 shorter than spore. 



On leaves of Calystegia septum: Champaign, June 8, 4914, 

 L, Aug. 11, 1013, II., Ill; LaSalle, June 21, 5254, L, II., Sept. 

 12, 1486, II., III., Sept. 16, 1556, II., Sept. 17, 1564; Fulton, L, 

 coll. J. Wolf; McLean, July 6, 2452, II., July 7, 2398, II., July 

 12, 2400, II., July 15, 5561, II., III., July 20, 2397, II., July 

 25, 2399, II., 2401, II., Aug. 1, 2403, II., Oct. 6, 1795, II., III.; 

 Piatt, Aug. 17, 1101, II.; McHenry, Aug. 28, 1248, II.; Lake, 

 Aug. 29, 1362, II.; Kane, Aug. 30, 1372; Boone, Sept. 2, 1424; 

 Lee, Sept. 8, 5717, II., III., Sept. 9, 5764, II., III.; JoDaviess, 

 Sept. 18, 5984, II., III.; Ogle, Sept. 22, 6110, II., III.; Rock 

 Island, Sept. 24, 1652, II., III., Sept. 27, 1677. 



While covered by the epidermis the sori have a livid hue, 

 and this condition usually lasts some time. 



P. gentianse, (Strauss) Lk. 



II., III. Epiphyllous or amphigenous. Spots none; sori 

 scattered, often rather large, long or even persistently covered 

 by the epidermis; uredospores subglobose or oval, sharply echin- 

 ulate, thick walled, rather dark brown, 18-24 by 21-27 /*; te- 

 leutospores very broadly oval, sometimes almost subglobose, 

 little constricted, apex slightly thickened or somewhat apicu- 

 late, each segment often showing a small nuclear spot, smooth, 

 21-30 by 30-37 A*; pedicel hyaline, fragile, usually crooked, 

 about twice the length of the spore. 



On Gentiana puberula : Lee, Sept. 11, 5786, II., III.; Sept. 

 27, 6202, II., III. 



The teleutospores are quite often single celled. 



P. polygoni-amphibii, Pers. 



II., III. Amphigenous. Sori small, round or angular, in 

 a circle about a larger sorus, or irregularly collected in small 

 clusters, long covered by the epidermis, often very numerous; 



