841 Illinois State Laboratory of Natural History. 
given to the latter, P. Asteris, Duby, P. T'ripolii, Wallr. (Flora 
Crypt. Germ. [1831-3] II. p. 223), and P. Astevis, Fckl. (Symb. 
Mycol. [1875] p. 53), which have been pronounced synonyms 
by several botanists, and from the material and descriptions at 
hand it is impossible to separate from these the American 
forms. Schréter (Hedw. XIV. [1875] p. 169), after an exam- 
ination of original specimens, confidently declares that the 
forms are specifically identical. Cooke (Grevillea III. [1875], 
p. 169) seems to regard Schweinitz’s species as distinct from 
the European plant, though not supposing P. Gerardii, Peck, 
specifically different from the former. After careful compari- 
son of specimens, all are here referred, as may be seen, to the 
species called Puccinia Asteris by Duby. 
P. silphii, Schw. 
III. Hypogenous; spots scabious, numerous, scattered, 
concave, with a raised rim; sori very prominent, wart-like, com- 
pact, dull grayish brown; spores irregular, oblong-clavate, con- 
spicuously and angularly pointed, firm, dark colored, but not 
thick walled, smooth, contents granular, 13 by 40 «; pedicel 
tinted, firm, about the length of the spore. The leaves are 
often thickly spotted and scarred by the fungus, and large 
patches of sori occur also on the stems. 
Spots rather small, purple; sori thick, pulvinate, confluent, aggre- 
gated, black; spores compact, of uniform color.—Schweinitz N. Am. 
Fungi, No. 2929, p. 296. 
On Silphium terebinthinaceum: McLean, June 28, 5275. 
S. integrifolium :McLean, June 23, 5276, July 14, 5536, July 16, 
2338, July 26, 2382; Champaign, Aug. 18, 1039; McHenry, 
Aug. 26, 1822, Aug. 27, 1837, Aug. 31, 1389, Sept. 1, 1408; La- 
Salle, Sept. 16, 1558. SS. perfoliatum: McLean, May 380, 4823; 
June 19, 5265, July 17,5579; Adams, June 30, 53868; McHenry, 
Aug. 24, 1272; Lee, Sept. 9, 5763. 
P. xanthii, Schw. 
JIL. Hypophyllous. Sori small, mostly closely clustered 
in spots or patches; spores smooth, oblong, evidently constrict- 
ed, apex slightly thickened, round, or beak-like, 15-21 by 
36-514; pedicel slightly colored, usually shorter than spore. 
