.Parasitic Fungi of Illinois. 179 



Thanks are due to Professor W. G. Farlow for the compa- 

 rison of this with original specimens. 



P. proserpinacae, Farlow. 



II V III. Amphigenous, but often only hypophyllous. Sori 

 rounded, scattered or collected in irregular groups, sometimes, 

 especially along the veins, confluent, rarely naked, the uredosori 

 surrounded by the remains of the ruptured epidermis, the two 

 kinds nearly of the same color, chestnut-brown, the teleutosori 

 becoming grayish from the germinating filaments; uredospores 

 obovate, pale cinnamon-colored, epispore rather thick, sharply 

 echinulate, 15-21 by 24-30 /*; teleutospores oblong, sometimes 

 narrower, usually gradually contracted at the septum, apex 

 thickened and rounded or pointed, epispore thin, smooth, cell 

 contents granular, pale brown, 15-21 by 35-52 /*; pedicel nearly 

 hyaline, usually about half the length of the spore. 



Sori round, scattered, soon becoming naked. Uredospores yellow- 

 ish brown, oval, echinulate, 20-26.5 // in diameter, average 22-23 //. Te- 

 leutospores brown, densely packed and germinating in the sorus, short- 

 stalked, clavate, contracted somewhat at the septum, apex rather acute, 

 with thickened cell wall, 38-5.3 /* by 17-21 //. Farlow, Proc. Am. Acad. 

 Arts & Sci., Vol. XVIII.. p. 80. 



On Proserpinacea palustris: Ravenswood, near Chicago, 

 Sept. 4, 1883. J. C. Arthur. 



P. circsese, Pers. 



III. Hypophyllous. Spots definite, purple or brown; sori 

 rounded, clustered, and more or less circinate; spores obiong, 

 slightly constricted, smooth, obtusely pointed, apex thickened, 

 narrowed at base. 15 by 24-66 /*; pedicel somewhat colored, 

 equalling or exceeding the length of spore. 



Scattered, wart-like, chestnut-color, spores ovate and acute. Pers. 

 Syn. Fung. p. 228. 



On Circcea Lufetiana: Johnson, May 11, 4611; Adams. 

 June 27. 5309; McLean-. July 15, 221)5, July 20, 2293, 5602, 

 July 27 2291, Aug. 1, 2294; Tazewell. July 22, 2292; Piatt. 

 Aug. 17, 1110; McHenry, Aug. 20, 1170, Aug. 22, 1204; Kane. 

 Aug. 30, 1379; Lee, Sept. 11, 5767; LaSalle, Sept. 17, inni. 



