158 Illinois State Laboratory of Natural History. 
the exsiccated specimen of Ellis, and the Illinois collections, 
sori also occur on the stems, in this differing from Cooke’s des- 
eription of U. triquetra, and the spores are not commonly an- 
gular, certainly not usually three-sided. The above description 
is drawn from specimens on Elodes virginica. On Hypericum 
mutilum the sori occur on both stems and leaves, are smaller 
and rounded, and the spores are rather smaller and lighter 
colored. 
U. terebinthi, (DC.) Wint. 
Amphigenous; spots yellow or yellowish red or none, usu-_ 
ally small; sori minute, scattered or crowded, soon naked. II. 
Spores elliptical, often roundish or obiong, usually obtusely 
pointed, covered with spiral lines of minute warts or beads, yel- 
lowish brown, 25 by 25-40», on a short hyaline deciduous 
pedicel. III. Spores vertically compressed or globose, with an 
obtuse cap-like point, verrucose with prominences in short ir- 
regular undulating lines, dark brown, about 25 » long (ver- 
tical dimension ) and 80 » wide; pedicel hyaline, stout, perma- 
nent, several times as long as the spore. 
Uromyces toxicodendri, B. & R. Effused, rufous; spores ovate, ob- 
tuse or apiculate, marked with short lines somewhat like the sporidia 
of Ascobolus furfuraceus.—Berk. Grev. vol. III., p. 56. 
Pileolaria brevipes, B. & R. Forming little specks on the under side 
of the leaves; stem short, flexuous; spores at first globose, with three 
coats, then depressed with a central nucleus. .00114 in. diam.—Berk. 
Grey. vol. ITI., p. 56. 
On leaves, petioles and stems of Rhus toxicodendron: Cham- 
paign, June 9, 4928, II.; Adams, June 27, 5319, IL, July 6, 
5482, IT., July 12, 5528, T.; McLean, July 12, 2442, IL, July 
16, 2487, IL, TIL. 2488, IL, IL, July 20, 5605, IT., 5606, IL, 
July 22, 2489, IT, 2440, IL., T1T., Ang. 1, 2442, IL, IIT., Aug. 
4, 2448, ID., TIT., Sept. 6, 5657, IT., IIL, Oct. 6, 1811; Piatt, 
Aug. 15, 1066, IT, IT.; McHenry, Aug. 24, 1266, IT., IIL; La 
Salle, Sept. 14, 1534, IT., III.; Stephenson, Sept. 14, 5883; Ogle, 
Sept. 25, 6167; Jersey, Oct. 14, 6317; Union, Oct. 25, 2019. 
This is often referred to the genus Pileolaria, Cast.; but 
mycologists are pretty well agreed (Léveillé, Tulasne, Winter, 
