Parasitic Fungi of Illinois. 173 



pale apiculus, thickly but minately tuberculate, 18-24 by 22-39^; 

 pedicel hyaline, fragile, short, sometimes more or less lateral. 



On Ranunculus repens: Riverside, Illinois, near Chicago, 

 June 2, 1883, J. C. Arthur. 



The little warts of the epispore are scarcely or not at all 

 visible in soaked specimens. The teleutospores sometimes ger- 

 minate in the sorus in June. One-celled specimens are not 

 uncommon, and some vary widely from the described type. 



P. podophylli, Schw. 



I. Hypogenous. Spots indefinite, mostly large, sometimes 

 confluent over the whole leaf, yellow; aecidia densely crowded, 

 very short, deeply and numerously split and much recurved, 

 very fragile; aecidiaspores subglobose or elliptical, epispore 

 very thin, minutely tuberculate, 16-27 ^; spermagonia minute, 

 rather sparsely scattered, opposite the secidia. (JEcidiwn podo- 

 phylli, Schw.) II. Unknown. III. Amphigenous on leaves 

 and stems, on the former mostly beneath; sori small, rounded, 

 usually more or less confluent; spores ovate, obovate or ellipti- 

 cal, beset with straight or curved conspicuous spines, 20-27 by 

 39-48 JK; pedicel very delicate and fugacious. 



On Podophyllum peltatum : Union, April 12, 4031, I, April 

 14, 4085, I., 4086, L. III., April 15, 4107, 1., III., April 17, 4130, 

 I., III., April 18, 4167, L, III., April 19, 4174, I., III., April 24, 

 4244, L, III., April 26, 4302, L, III., 4304, L, III., April 29, 

 4392, I, III.; Jackson, April 20, 4196, L, III., April 21, 4215, 

 L, III., April 27, 4341, L, III.; Pulaski, May 1, 4400, L, III., 

 4419, L, May 4. 4482. L, III., May 5, 4496, III., May 6, 4526, 

 I, III.; McLean, July 5, 2279, July 7, 2283, July 12, 2282, 

 Aug. 1, 2281; Tazewell, July 22, 2288; McHenry, Aug. 20, 

 1140; Lake, Aug. 27, 1348. 



Commonly known as P. aculeata, Schw., but the above 

 name has priority. The species is readily identified by the 

 spines of the teleutospore. The secidia occur on the parenchy- 

 mentous portions of the leaf, and the teleutospores are not 

 unfrequently subsequently produced along the veins and upon 

 the stems, having no apparent mycelial connection with the 

 aecidia. In other cases they are produced either in the midst 

 of the aecidia or in close proximity to them. 



