164 Illinois State Laboratory of Natural History. 



5826; JoDaviess, Sept. 18, 5983; Rock Island, Sept. 24, 1649; 

 LaSalle, Sept. 28, 6225; McLean, Oct. 19, 1892. A. tuberosa: 

 McHenry, Aug. 26. 1318; Champaign, Sept. 20. A. incarnata: 

 LaSalle, Sept. 28, 6211. 



The pedicels in this species very easily break away. They 

 are riot short and permanent in specimens examined, as indi- 

 cated by Peck, 30th Rep. N. Y. State Mus., p. 75. The minute 

 roughness of the surface is indicative of a uredoform, but no 

 other form has been found, and these are certainly often pro- 

 duced very late in the season. On account of the deciduous 

 pedicels, Peck at first described the species under the generic 

 name of Trichobasis (23d Rep. N. Y. State Mus. [1873], p. 58), 

 but in 30th Rpt. [1878], p. 75, transferred it to Uromyces, 

 where it doubtless belongs. Perhaps strictness would require 

 the insertion of Peck in parenthesis, as authority for the spe- 

 cific name. 



This is Uromyces asclepiadis, Cke. (Grevillea V. [1877]. 

 p. 152). 



U. polygon!, (Pers.) Fckl. 



I. Amphigenous; spots minute, inconspicuous; secidia 

 few, irregularly collected in little groups, small, very short, 

 lacerated border scarcely recurved; spores subglobose or ellip- 

 tical, epispore thin, tuberculate, 15-18 by 18-21 /u, spermogo- 

 nia not found. II. Amphigenous; spots yellowish, sori small, 

 scattered, rotund, somewhat elevated; spores subglobose, epi- 

 spore thick, minutely roughened, 21 by 24 A*. III. Sori caul- 

 ine, elongated, confluent, dark brown, prominent; spores oval, 

 obovate or oblong, obtuse, epispore smooth, thickened at the 

 apex, 15-24 by 21-35 ^; pedicels long, persistent, sometimes 

 reaching 100 ^. 



On Polyyomim aviculare, var. erectum: McLean, May 23, 

 4745, I., May 25, 4796, I., II., June 1, 4888, I., II., July 11, 

 2350, II., Oct. 11, 1834, II., III.; LaSalle, June 19, 5238, II.; 

 Champaign, Aug. 11, 1009, II.; McHenry, Aug. 31, 1395, II., 

 III.; LaSalle, Sept. 12, 1488 ; II., Sept. 13, 1493, II., III.; 

 Union, Oct. 26, 2030, II., III. P. ramosissimum: Lake, Aug. 

 22, 1222; Lee, Sept. 9, II., III.; Union, Oct. 31, 2152, II., III. 



