166 Illinois State Laboratory of Natural History. 
The synonymy of this species is discussed by Professor Far- 
low-in the Bulletin of the Bussey Institution, IT, p. 245. 
Ucaladii, (Schw.) Farlow. 
I. Acidia scattered over the whole under surface of the 
leaf, short, with a spreading border; spores subglobose to ellip- 
tical, angular, minutely roughened, 15-18 by 18-24 #; sperm- 
ogonia also hypophyllous, scattered, preceding and accompany- 
ing the ecidia. IL., JJ. Amphigenous; sori scattered, round 
or oblong, often long remaining partly covered by the epider- 
mis, frequently confluent. II. Spores pyriform, truncate at 
the base, epispore thick, slightly thicker at the apex, conspicu- 
ously echinulate, 15-21 by 25-32 4. ITI. Spores oval, sub- 
globose or pyriform, smooth, apiculate, 16-21 by 25-32 u; ped- 
icels about as long as the spores, very fragile and deciduous, 
leaving a small portion attached. 
On Arisema triphyllum: McLean, May 28, 4755, 1, Aug. 
1, 2359, TIT., Aug. 6, 2358, III.; LaSalle, June 15, 4991, L. 
A. dracontium: Union, April 14, 4098 (spermogones), April 
17, 4185, I., April 29, 4894, I.; Jackson, April 18, 4164, I., 
April 19, 4193, I.; Pulaski, May 1, 4399, I., II., May 2, 4423, I, 
May 6, 4527, L, I., HI., May 10, 4590, I.; Johnson, May 12, 
4638, L., IL; McLean, May 23, 4754, 1, July 20, 2357, IIL, 
July 29, 2356, III.: LaSalle, June 21, 5258, I., IL, IIT.; Adams, 
July 3, 5391, IL, IIL, July 5, 5410, IIL, July 6, 5435, O., TIL, 
July 7, 5445, IL., IIL, July 10, 5459, I., I1L.; Tazewell, July 22, 
2355, III.; Piatt, Aug. 17, 1114, UI.; Kane, Aug. 30, 1884, 
TIT.;#Rock Island, Sept. 24, 1642, I]. Peltandra virginica: 
Indiana, near Cook Co. line, Sept. 7, 1456, IT., III. 
The following is the synonomy of this species: Uredo 
Caladii, Schw. Syn. Fung. Car. [1822], No. 480. Cwoma 
(Uredo) Ari Virginici, Schw. Syn. N. Am. Fungi [1884], No. 
2839. Uromyces Peltandre, Howe. Bull. Torr. Bot. Club, V. 
[1874], p. 48. Uromyces Ari-Virginici, Howe. 1. ¢., p. 43. 
Uromyces Pontederie, Ger. 1. c. VI, p. 31. Uromyces Ariseme, 
Cke. l.c., p. 82. 
Schweinitz was probably mistaken at first in his host plant, 
and means to correct the error by changing the specific name 
to Ari Virginici in the N. Am. Fungi. His description in the 
