/Y/r Fungi of Illinois. 205 



brown, teleutospores usually three, sometimes two, more often 

 four-celled, oblong or broadly clavate, somewhat constricted at 

 the septum, vertex slightly thickened, obtusely rounded, nar- 

 rowed toward the base, epispore thin, smooth. 21-27 by 36-90 ^ ; 

 pedicel hyaline, tapering below, from one third to one half 

 the length of the spore. 



On leaves of Pofentilla Canadmmis : Union, April 16*, 5015, 

 II.. April 26, 4311, II, April 29, 4390, II.; Jackson. April 19, 

 4177, II., April 28, 4366, II.; Pulaski, May 9, 4579, II. ; John- 

 son, May 12, 4651,. II.; LaSalle, June 15. 4999, II., Sept. 28, 

 6223, III., Sept. 29, 6232, III.; Adams, June 27, 5307, II., July 

 3. 5384, II., July 5, 5407, II., 5417, II, July 6, 5441, II., July 

 10, 5461, II.; McLean. July 26, 2415, II.; McHenry, Aug. 25, 

 1321, II.. Ill; Stephenson,"Sept. 13, 5816, II; JoDaviess, Sept. 

 ir>. r>896. III.; Ogle, Sept. 26, 6188, IL, III.; Fulton. Oct. 3. 

 1731, II., III.; Jersey, Oct. 12, 6274, III. 



This is Ph. triartirulatum, B. & C.; but there is little rea- 

 son to consider the American specimens specifically distinct 

 from the European Ph. frayarice, according to Winter's de- 

 scription (Die Pilze, p. 228), and the specimens in Rabh. Herb. 

 Myc., 281. On neither the latter nor the Illinois specimens 

 was there observed any roughness of the epispore. 



Ph. mucronatum, (Pers.) Lk. 



L, II.. III. JEcidia amphigenous. on the leaves more com- 

 monly hypophyllous. and of different sizes, but usually small, 

 in little groups on a distinct reddish, yellow-bordered spot, on 

 the larger veins, petioles, and young stems confluent and swol- 

 len, conspicuous, causing more or less distortion of the host, 

 surrounded by clavate. incurved, colorless paraphyses, bright 

 orange-colored; secidiospores subglobose or angular, produced 

 in erect chains, becoming rough-warty towards maturity, 18-24 

 ft: uredosori hypophyllous. small, scattered, very numerous, 

 sometimes sparingly confluent, surrounded by many incurved, 

 clavate. colorless paraphyses, yellow; uredospores subglobose. 

 rough-warty, each produced on a pedicel. 18 p; teleutosori hy- 

 pophyllous. scattered, small, powdery, brownish-black; teleuto- 

 spores cylindrical or oblong-elliptical, vertex narrowed and mu- 

 cronate, apiculus hyaline, six- to eleven-septate, rather coarsely 



