164 Illinois State Laboratory of Natural History. 
5826; JoDaviess, Sept. 918, 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 not 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 specics under the generic 
name of T'richobasis (23d Rep. N. Y. State Mus. [18783], 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. polygoni, ( Pers.) Fckl. 
I. Amphigenous; spots minute, inconspicuous; ecidia 
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 », spermogo- 
nia not found. II. Amphigenous; spots yellowish, sori small, 
scattered, rotund, somewhat elevated; spores subglobose, epi- 
spore thick, minutely roughened, 21 by 24». 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 z. 
On Polygonum aviculare, var. erectum: McLean, May 23, 
4745, I, May 25, 4796, I., II., June 1, 4888, L, I., July 11, 
2350, IL, Oct. 11, 1834, IT., III.; LaSalle, June 19, 5238, IT.; 
Champaign, Aug. 11, 1009, I.; McHenry, Aug. 31, 1395, IL., 
IIL.; LaSalle, Sept. 12, 1488, II, Sept. 13, 1498, IL, IIL; 
Union, Oct. 26, 2030, IL., III. P. ramosissimum: Lake, Aug. 
22, 1222; Lee, Sept. 9, IT., III.; Union, Oct. 31, 2152, IL., IIT. 
