/V/Y/x/7/V l^innji of Illinois. 163 



U. spermacoces, (Schw.) Curt. 



II., III. Amphigenous, on stems and leaves; spots, none 

 observed; sori numerous, scattered, very prominent, rounded, 

 black, surrounded by the upturned epidermis. II. Spores 

 subglobose, yellowish, very minutely warty, 21-25 by 22-27 p.. 

 III. Spores subglobose, smooth, uniformly very dark colored, 

 24-27 by 30 ^; pedicels persistent, about 8-4 times the length 

 of the spore. 



On stems and leaves of Diodia teres: Union, Oct. 25, 1994, 

 Oct. 29, 2122, Nov. 1, 2199. The uredo form was collected in 

 Union Co., Aug. 1880, by 0. W. Butler. 



U. Rudbeckise, Arth. & Hoi. (in lit.). 



Hypophyllous; spots pale, then brown or black, numer- 

 ous, scattered; sori small, densely clustered, somewhat circinat- 

 ing, slightly raised, clusters plane, epidermis at length vanish- 

 ing with no remains around the cinnamon-colored sori; spores 

 oblong-obovate, obtuse or obtusely pointed, pallid, about 12 by 

 20 p ; pedicel slender, hyaline, somewhat longer than the spore. 



On Rudbeckia laciniata : McHenry, Aug. 24, 1273; Ste- 

 phenson, Sept. 21, 6084. 



The spots resemble some forms of Puccinia aster is, the 

 leaf soon breaking away, leaving holes as if eaten by an insect. 



U. Howei, Peck. 



III. Spots none; sori hypogenous, scattered, indefinitely 

 clustered, ' of ten confluent, surrounded by the remains of the 

 ruptured epidermis, blackish purple; spores oval or subglobose, 

 warty, 18-21 by 21-25 ^; pedicels about twice the length of 

 the spore, very fragile, breaking off, leaving a small portion at- 

 tached to the spore, which therefore appears to be very short- 

 pediceled. 



Hypogenous, sori scattered or subconfluent, surrounded by the 

 ruptured epidermis, from one-half to one line in diameter; spores 

 brown, subglobose, roughened with slight indentations (?), .00083 to 

 .0010 in. in diameter. Peck, 23d Rpt. N. Y. State Museum [1873], p. 58. 



On leaves of Asclepias cornuti: Champaign, Aug. 11, 1016: 

 Cook, Sept. 8, 2351; Lee, Sept. 9, 5755; Stephenson, Sept. 13, 



