Parasitic Fungi of Illinois. 229 
curved narrow border abrupt, finely divided; spores large, sub- 
globose or elliptical, epispore very thick, very conspicuously re- 
ticulately roughened, 28-36 by 33-43 4; spermagonia scattered 
over the upper side of infected area, minute, reddish brown. 
On Cephalanthus occidentalis: Ravenswood, near Chicago, 
June (A.D. 1883), coll. J. C. Arthur; Quincy, July 12 (A.D. 
1883), coll. C. A. Hart. 
45. houstoniatum, Schw. 
Hypophyllous. icidia scattered over the entire leaf, 
small, very short, recurved border narrow, many times split; 
spores globose or elliptical, often angular, minutely tuberculate, 
12-15 by 15-18 »; spermagonia numerous, conspicuous, appear- 
ing before the wxcidia, scattered over the entire under surface, 
occasionally above, purple. 
Without distinct spots. Pseudoperidia elevated, pallid, subconical, 
contracted at the apex, and somewhat excavated. Spores orange. The 
infected plant, though degenerated, yet flowers.—Schweinitz, N. Am. 
Fung., No. 289], p. 293. 
On Houstonia cwrulea: Union, April 16, 5010 (Karle), 
April 17, 4133, April 26, 4807; Jackson, April 27, 4844, April 
28, 4362; Johnson, May 13, 4663. 
The infected plants are easily recognized, as the fungus 
causes them to grow more slender and more strictly erect, often 
taller, and gives them a yellowish appearance. 
48. erigeronatum, Schw. 
Hypophyllous. Spots usually distinct, large, swollen, yel- 
low; ecidia subcircinate or irregularly crowded, short, soon 
many times divided and much recurved; fragile, soon becoming 
pulverulent; spores subglobose, epispore thin, tuberculate, 
12-15 »: spermagonia indistinct, few, usually centrally crowd- 
ed, mostly on upper side of leaf, yellow. 
Spots large, yellowish, somewhat swollen, pseudoperidia densely 
distributed, without order, elevated, spores yellowish.—Schweinitz, N. 
Am. Fungi, No. 2869, p. 292. 
On Erigeron Canadense: Adams, June 27, 5306, July 6, 
5434. E, bellidifolium: Johnson, May 13, 4664, May 16, 4699. 
